Khi internet v\u1ec7 tinh tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong \u201cC\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1edbi\u201d c\u1ee7a Trung Qu\u1ed1c, s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a n\u00f3 \u0111ang \u0111\u01b0\u1ee3c \u0111\u1ea9y m\u1ea1nh, th\u1ec3 hi\u1ec7n ti\u1ec1m n\u0103ng to l\u1edbn trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 t\u00edch h\u1ee3p qu\u00e2n s\u1ef1-d\u00e2n s\u1ef1, ph\u1ee7 s\u00f3ng to\u00e0n c\u1ea7u v\u00e0 th\u00f4ng tin li\u00ean l\u1ea1c kh\u1ea9n c\u1ea5p. Tuy nhi\u00ean, s\u1ef1 ph\u00e2n b\u1ed1 r\u1ed9ng r\u00e3i c\u1ee7a c\u00e1c n\u00fat v\u1ec7 tinh, c\u00e1c li\u00ean k\u1ebft truy\u1ec1n th\u00f4ng m\u1edf v\u00e0 m\u00f4i tr\u01b0\u1eddng tri\u1ec3n khai ph\u1ee9c t\u1ea1p khi\u1ebfn h\u1ec7 th\u1ed1ng n\u00e0y d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng tr\u01b0\u1edbc c\u00e1c m\u1ed1i \u0111e d\u1ecda an ninh nghi\u00eam tr\u1ecdng, nh\u01b0 gi\u1ea3 m\u1ea1o danh t\u00ednh, \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u, nhi\u1ec5u t\u00edn hi\u1ec7u v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ch\u00e8n l\u1ed7i. Trong b\u1ed1i c\u1ea3nh n\u00e0y, chip RF, v\u1edbi t\u01b0 c\u00e1ch l\u00e0 th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng v\u1ec7 tinh, tr\u1ef1c ti\u1ebfp quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 tin c\u1eady c\u1ee7a to\u00e0n b\u1ed9 li\u00ean k\u1ebft truy\u1ec1n th\u00f4ng.<\/p>\n\n\n\n
D\u1ef1a tr\u00ean nh\u1eefng \u00fd t\u01b0\u1edfng c\u1ed1t l\u00f5i c\u1ee7a b\u00e0i b\u00e1o \u201cThi\u1ebft k\u1ebf chip b\u1ea3o m\u1eadt cho m\u1ea1ng Internet v\u1ec7 tinh\u201d<\/em> v\u00e0 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a chip RF trong truy\u1ec1n th\u00f4ng v\u1ec7 tinh, b\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec1 xu\u1ea5t m\u1ed9t thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac chip RF t\u00edch h\u1ee3p c\u00e1c c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt nh\u1eb1m t\u0103ng c\u01b0\u1eddng t\u00ednh b\u1ea3o m\u1eadt c\u1ee7a thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i internet v\u1ec7 tinh.<\/p>\n\n\n\n Internet v\u1ec7 tinh, \u0111\u01b0\u1ee3c cung c\u1ea5p th\u00f4ng qua c\u00e1c v\u1ec7 tinh qu\u1ef9 \u0111\u1ea1o th\u1ea5p (LEO), mang l\u1ea1i ph\u1ea1m vi ph\u1ee7 s\u00f3ng to\u00e0n c\u1ea7u, v\u1edbi c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i \u0111\u01b0\u1ee3c tri\u1ec3n khai trong nhi\u1ec1u b\u1ed1i c\u1ea3nh kh\u00e1c nhau, bao g\u1ed3m tr\u1ea1m m\u1eb7t \u0111\u1ea5t, ph\u01b0\u01a1ng ti\u1ec7n giao th\u00f4ng, t\u00e0u th\u1ee7y v\u00e0 m\u00e1y bay. C\u00e1c chip RF \u0111\u1ea3m nhi\u1ec7m vi\u1ec7c truy\u1ec1n v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u, \u0111\u1ed3ng th\u1eddi \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u201ch\u00e0ng ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean\u201d trong li\u00ean k\u1ebft truy\u1ec1n th\u00f4ng, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh m\u1ee5c ti\u00eau d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng nh\u1ea5t \u1edf l\u1edbp v\u1eadt l\u00fd. C\u00e1c chip RF truy\u1ec1n th\u1ed1ng t\u1eadp trung v\u00e0o \u0111i\u1ec1u ch\u1ebf, gi\u1ea3i \u0111i\u1ec1u ch\u1ebf t\u00edn hi\u1ec7u v\u00e0 \u0111i\u1ec1u ch\u1ec9nh t\u1ea7n s\u1ed1, thi\u1ebfu c\u00e1c c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt \u0111\u1ec3 x\u00e1c th\u1ef1c danh t\u00ednh, ch\u1ed1ng h\u00e0ng gi\u1ea3 v\u00e0 ch\u1ed1ng t\u1ea5n c\u00f4ng, do \u0111\u00f3 khi\u1ebfn ch\u00fang d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng.<\/p>\n\n\n\n \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c m\u00f4-\u0111un b\u1ea3o m\u1eadt v\u00e0o chip RF nh\u1eb1m hi\u1ec7n th\u1ef1c h\u00f3a ph\u01b0\u01a1ng ch\u00e2m \u201cgiao ti\u1ebfp ch\u00ednh l\u00e0 b\u1ea3o m\u1eadt\u201d l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t m\u1ea1ng v\u1ec7 tinh an to\u00e0n t\u1eeb \u0111\u1ea7u \u0111\u1ebfn cu\u1ed1i.<\/p>\n\n\n\n B\u00e0i b\u00e1o n\u00e0y \u0111\u1ec1 xu\u1ea5t vi\u1ec7c t\u00edch h\u1ee3p m\u1ed9t h\u1ec7 th\u1ed1ng con b\u1ea3o m\u1eadt v\u00e0o chip RF, bao g\u1ed3m:<\/p>\n\n\n\n T\u1eadn d\u1ee5ng s\u1ef1 bi\u1ebfn \u0111\u1ed9ng trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t chip, chip RF n\u00e0y t\u00edch h\u1ee3p c\u00e1c \u0111\u01a1n v\u1ecb PUF d\u1ef1a tr\u00ean SRAM \u0111\u1ec3 t\u1ea1o ra m\u1ed9t m\u00e3 \u0111\u1ecbnh danh thi\u1ebft b\u1ecb duy nh\u1ea5t. M\u00e3 \u0111\u1ecbnh danh n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c th\u1ef1c thi\u1ebft b\u1ecb, t\u1ea1o kh\u00f3a, c\u0169ng nh\u01b0 ng\u0103n ch\u1eb7n vi\u1ec7c sao ch\u00e9p v\u00e0 gi\u1ea3 m\u1ea1o thi\u1ebft b\u1ecb.<\/p>\n\n\n\n Vi\u1ec7c t\u00edch h\u1ee3p c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a qu\u1ed1c gia nh\u01b0 SM2, SM3 v\u00e0 SM4 \u0111\u1ec3 m\u00e3 h\u00f3a, gi\u1ea3i m\u00e3 v\u00e0 x\u00e1c minh t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u truy\u1ec1n th\u00f4ng theo th\u1eddi gian th\u1ef1c gi\u00fap \u0111\u1ea3m b\u1ea3o t\u00ednh b\u1ea3o m\u1eadt v\u00e0 t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i kh\u00f4ng d\u00e2y.<\/p>\n\n\n\n \u0110\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb xa nh\u01b0 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb v\u00e0 laser, m\u1ed9t m\u1ea1ch gi\u00e1m s\u00e1t m\u00e1y tr\u1ea1ng th\u00e1i \u0111a v\u00f9ng \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n trong chip. Ngay khi ph\u00e1t hi\u1ec7n c\u00e1c chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i b\u1ea5t th\u01b0\u1eddng, m\u1ea1ch n\u00e0y s\u1ebd k\u00edch ho\u1ea1t c\u1ea3nh b\u00e1o v\u00e0 chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 b\u1ea3o m\u1eadt \u0111\u1ec3 ng\u0103n ch\u1eb7n r\u00f2 r\u1ec9 kh\u00f3a ho\u1eb7c vi\u1ec7c can thi\u1ec7p v\u00e0o ch\u01b0\u01a1ng tr\u00ecnh.<\/p>\n\n\n\n M\u1ed9t giao di\u1ec7n b\u1ea3o m\u1eadt chuy\u00ean d\u1ee5ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 truy\u1ec1n tr\u1ef1c ti\u1ebfp t\u00edn hi\u1ec7u \u0111\u1ea7u ra t\u1eeb PUF v\u00e0o m\u00f4-\u0111un m\u00e3 h\u00f3a, ng\u0103n ch\u1eb7n s\u1ef1 can thi\u1ec7p c\u1ee7a CPU v\u00e0 tr\u00e1nh vi\u1ec7c truy c\u1eadp tr\u00e1i ph\u00e9p \u1edf c\u1ea5p \u0111\u1ed9 ph\u1ea7n m\u1ec1m. Ngo\u00e0i ra, b\u1ed9 nh\u1edb Flash \u0111\u01b0\u1ee3c ph\u00e2n v\u00f9ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 c\u00e1ch ly gi\u1eefa c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh b\u1ea3o m\u1eadt v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n Trong c\u00e1c tr\u1ea1m v\u1ec7 tinh, chip RF v\u00e0 chip b\u1ea3o m\u1eadt kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp; thay v\u00e0o \u0111\u00f3, ch\u00fang ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 t\u00edch h\u1ee3p \u201cb\u1ea3o m\u1eadt t\u00edn hi\u1ec7u\u201d.\u201d<\/p>\n\n\n\n Con chip RF \u0111\u1ea3m nhi\u1ec7m vi\u1ec7c truy\u1ec1n v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u kh\u00f4ng d\u00e2y c\u0169ng nh\u01b0 x\u1eed l\u00fd s\u01a1 b\u1ed9.<\/p>\n\n\n\n Chip b\u1ea3o m\u1eadt \u0111\u1ea3m nhi\u1ec7m c\u00e1c ch\u1ee9c n\u0103ng x\u00e1c th\u1ef1c danh t\u00ednh, qu\u1ea3n l\u00fd kh\u00f3a v\u00e0 m\u00e3 h\u00f3a d\u1eef li\u1ec7u.<\/p>\n\n\n\n Hai th\u00e0nh ph\u1ea7n n\u00e0y \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i th\u00f4ng qua m\u1ed9t bus n\u1ed9i b\u1ed9 ho\u1eb7c giao di\u1ec7n b\u1ea3o m\u1eadt chuy\u00ean d\u1ee5ng, \u0111\u1ea3m b\u1ea3o s\u1ef1 ph\u1ed1i h\u1ee3p li\u1ec1n m\u1ea1ch gi\u1eefa \u201cRF-b\u0103ng t\u1ea7n c\u01a1 s\u1edf-b\u1ea3o m\u1eadt\u201d \u1edf ba c\u1ea5p \u0111\u1ed9.<\/p>\n\n\n\n Thi\u1ebft k\u1ebf n\u00e0y cho ph\u00e9p chip RF nh\u1eadn di\u1ec7n v\u00e0 ch\u1eb7n c\u00e1c thi\u1ebft b\u1ecb v\u00e0 t\u00edn hi\u1ec7u gi\u1ea3 m\u1ea1o, t\u1eeb \u0111\u00f3 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n Thi\u1ebft k\u1ebf \u0111\u1ec1 xu\u1ea5t \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng tr\u00ean n\u1ec1n t\u1ea3ng FPGA, v\u1edbi c\u00e1c k\u1ebft qu\u1ea3 sau:<\/p>\n\n\n\n M\u00f4-\u0111un PUF th\u1ec3 hi\u1ec7n t\u00ednh ng\u1eabu nhi\u00ean v\u00e0 t\u00ednh duy nh\u1ea5t cao, \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 nh\u1eadn d\u1ea1ng thi\u1ebft b\u1ecb.<\/p>\n\n\n\n M\u1ea1ch ph\u00e1t hi\u1ec7n l\u1ed7i c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh hi\u1ec7u qu\u1ea3 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng b\u1eb1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb v\u00e0 tia laser, v\u1edbi th\u1eddi gian ph\u1ea3n h\u1ed3i \u1edf m\u1ee9c vi gi\u00e2y.<\/p>\n\n\n\n Sau khi t\u00edch h\u1ee3p m\u00f4-\u0111un b\u1ea3o m\u1eadt, chip RF v\u1eabn duy tr\u00ec m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng th\u1ea5p v\u00e0 \u0111\u1ed9 tr\u1ec5 th\u1ea5p, nh\u1edd \u0111\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i v\u1ec7 tinh.<\/p>\n\n\n\n Trong t\u01b0\u01a1ng lai, khi internet v\u1ec7 tinh t\u00edch h\u1ee3p v\u1edbi c\u00e1c m\u1ea1ng 5G\/6G v\u00e0 ph\u00e1t tri\u1ec3n th\u00e0nh m\u1ed9t m\u1ea1ng l\u01b0\u1edbi kh\u00f4ng gian-m\u1eb7t \u0111\u1ea5t th\u1ed1ng nh\u1ea5t, hi\u1ec7u su\u1ea5t b\u1ea3o m\u1eadt c\u1ee7a c\u00e1c chip RF s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t ti\u00eau ch\u00ed quan tr\u1ecdng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 li\u1ec7u c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i c\u00f3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n hay kh\u00f4ng.<\/p>\n\n\n\n D\u1ef1a tr\u00ean c\u00e1c thi\u1ebft k\u1ebf chip b\u1ea3o m\u1eadt truy\u1ec1n th\u1ed1ng, b\u00e0i b\u00e1o n\u00e0y \u0111\u1ec1 xu\u1ea5t vi\u1ec7c chuy\u1ec3n c\u00e1c c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt l\u00ean c\u1ea5p \u0111\u1ed9 chip RF, t\u1eeb \u0111\u00f3 t\u1ea1o ra m\u1ed9t ki\u1ebfn tr\u00fac thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i \u201ct\u00edch h\u1ee3p b\u1ea3o m\u1eadt RF\u201d. B\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p PUF, c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a qu\u1ed1c gia v\u00e0 c\u00e1c m\u00f4-\u0111un ch\u1ed1ng t\u1ea5n c\u00f4ng l\u1ed7i, chip RF kh\u00f4ng ch\u1ec9 x\u1eed l\u00fd t\u00edn hi\u1ec7u m\u00e0 c\u00f2n tr\u1edf th\u00e0nh tuy\u1ebfn ph\u00f2ng th\u1ee7 \u0111\u1ea7u ti\u00ean trong b\u1ea3o m\u1eadt internet v\u1ec7 tinh. Kh\u00e1i ni\u1ec7m thi\u1ebft k\u1ebf n\u00e0y mang l\u1ea1i nh\u1eefng g\u1ee3i \u00fd qu\u00fd gi\u00e1 cho s\u1ef1 ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb truy\u1ec1n th\u00f4ng v\u1ec7 tinh nh\u1ecf g\u1ecdn, c\u00f3 \u0111\u1ed9 b\u1ea3o m\u1eadt cao v\u00e0 chi ph\u00ed th\u1ea5p.<\/p>","protected":false},"excerpt":{"rendered":" As satellite internet becomes a key part of China’s “New Infrastructure,” its development is accelerating, demonstrating immense potential in areas such as military-civil integration, global coverage, and emergency communications. However, the wide distribution of satellite nodes, open communication links, and complex deployment environments make it vulnerable to significant security threats, such as identity spoofing, data […]<\/p>\n","protected":false},"author":1,"featured_media":1401,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,31],"tags":[36],"class_list":["post-1448","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-insights","category-blog","tag-yvette-wu"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/posts\/1448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/comments?post=1448"}],"version-history":[{"count":1,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/posts\/1448\/revisions"}],"predecessor-version":[{"id":1449,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/posts\/1448\/revisions\/1449"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/media\/1401"}],"wp:attachment":[{"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/media?parent=1448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/categories?post=1448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wallisemi.com\/vi\/wp-json\/wp\/v2\/tags?post=1448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}1. Nh\u1eefng th\u00e1ch th\u1ee9c v\u1ec1 an ninh c\u1ee7a Internet v\u1ec7 tinh v\u00e0 vai tr\u00f2 c\u1ee7a chip RF<\/strong><\/strong><\/h5>\n\n\n\n
2. Thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac chip RF t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt<\/strong><\/strong><\/h5>\n\n\n\n
2.1 M\u00f4-\u0111un Ch\u1ee9c n\u0103ng Kh\u00f4ng th\u1ec3 Sao ch\u00e9p V\u1eadt l\u00fd (PUF)<\/strong><\/strong><\/h6>\n\n\n\n
2.2 T\u0103ng t\u1ed1c ph\u1ea7n c\u1ee9ng cho c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a qu\u1ed1c gia<\/strong><\/strong><\/h6>\n\n\n\n
2.3 C\u01a1 ch\u1ebf ch\u1ed1ng t\u1ea5n c\u00f4ng l\u1ed7i<\/strong><\/strong><\/h6>\n\n\n\n
2.4 Giao di\u1ec7n b\u1ea3o m\u1eadt v\u00e0 c\u00e1ch ly quy\u1ec1n truy c\u1eadp<\/strong><\/strong><\/h6>\n\n\n\n
3. C\u01a1 ch\u1ebf ph\u1ed1i h\u1ee3p gi\u1eefa chip RF v\u00e0 chip b\u1ea3o m\u1eadt<\/strong><\/strong><\/h5>\n\n\n\n
4. Ki\u1ec3m ch\u1ee9ng th\u1ef1c nghi\u1ec7m v\u00e0 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng<\/strong><\/strong><\/h5>\n\n\n\n
5. K\u1ebft lu\u1eadn<\/strong><\/strong><\/h5>\n\n\n\n