<\/a><\/p>\n C\u1ed9t m\u1ed1c 1378.<\/em><\/p>\n Nh\u1eefng ng\u00e0y n\u00e0y, \u0111\u1ebfn Tr\u00e0 C\u1ed5 – n\u01a1i c\u00f3 m\u0169i Sa V\u0129 l\u00e0 \u0111i\u1ec3m \u0111\u1ea7u ti\u00ean \u0111\u1ec3 ch\u1ea5m n\u00e9t b\u00fat v\u1ebd n\u00ean h\u00ecnh ch\u1eef S tr\u00ean b\u1ea3n \u0111\u1ed3 Vi\u1ec7t Nam. Gi\u1eefa mu\u00f4n tr\u00f9ng s\u00f3ng bi\u1ebfc, c\u1ed9t m\u1ed1c 1378 s\u1eebng s\u1eefng, hi\u00ean ngang gi\u1eefa \u0111\u1ea5t tr\u1eddi.<\/p>\n K\u1ec3 v\u1ec1 c\u00e2u chuy\u1ec7n x\u00e2y d\u1ef1ng c\u1ed9t m\u1ed1c kh\u00e1 \u0111\u1eb7c bi\u1ec7t n\u00e0y, Th\u01b0\u1ee3ng t\u00e1 Nguy\u1ec5n Th\u1ebf Th\u1ea3o, Ch\u00ednh tr\u1ecb vi\u00ean \u0110\u1ed3n Bi\u00ean ph\u00f2ng Tr\u00e0 C\u1ed5 (B\u1ed9 Ch\u1ec9 huy B\u1ed9 \u0111\u1ed9i Bi\u00ean ph\u00f2ng Qu\u1ea3ng Ninh) cho bi\u1ebft: \u0110\u00e2y l\u00e0 2 c\u1ed9t m\u1ed1c l\u00e0 \u0111\u01b0\u1eddng bi\u00ean gi\u1edbi tr\u00ean b\u1ed9 nh\u01b0ng l\u1ea1i n\u1eb1m tr\u00ean khu v\u1ef1c c\u1eeda s\u00f4ng B\u1eafc Lu\u00e2n. Qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng, th\u1ee7y tri\u1ec1u l\u00ean xu\u1ed1ng th\u1ea5t th\u01b0\u1eddng.<\/p>\n \u201cTrong qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng ta \u0111\u1ec1u ph\u1ea3i d\u1ef1a v\u00e0o con n\u01b0\u1edbc, d\u1ef1a v\u00e0o th\u1ee7y tri\u1ec1u, l\u1ef1c l\u01b0\u1ee3ng thi c\u00f4ng ph\u1ea3i d\u00e0i ng\u00e0y h\u01a1n, v\u1ea5t v\u1ea3 h\u01a1n. T\u1eeb ch\u00e2n \u0111\u1ebf, th\u1ee7y tri\u1ec1u nh\u1eefng l\u00fac n\u01b0\u1edbc l\u00ean to ta kh\u00f4ng th\u1ec3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c ch\u00e2n \u0111\u1ebf. L\u1ef1c l\u01b0\u1ee3ng thi c\u00f4ng ph\u1ea3i \u0111\u1ee3i l\u00fac th\u1ee7y tri\u1ec1u r\u00fat. Qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng r\u1ea5t kh\u00f3 kh\u0103n cho ch\u00fang ta l\u00e0 th\u1eddi gian k\u00e9o d\u00e0i v\u00ec ta x\u00e2y d\u1ef1ng d\u01b0\u1edbi m\u1ef1c n\u01b0\u1edbc \u00e2m\u201d, Th\u01b0\u1ee3ng t\u00e1 Nguy\u1ec5n Th\u1ebf Th\u1ea3o n\u00f3i.<\/p>\n N\u1ebfu \u0111i\u1ec3m c\u1ef1c B\u1eafc bi\u00ean gi\u1edbi \u0111\u1ea5t li\u1ec1n thu\u1ed9c x\u00e3 L\u0169ng C\u00fa (huy\u1ec7n \u0110\u1ed3ng V\u0103n, t\u1ec9nh H\u00e0 Giang) th\u00ec \u0111\u01b0\u1eddng bi\u00ean gi\u1edbi bi\u1ec3n kh\u1edfi \u0111\u1ea7u ch\u00ednh l\u00e0 Sa V\u0129. V\u00ec c\u1ed9t m\u1ed1c 1377, 1378 ph\u00e2n \u0111\u1ecbnh bi\u00ean gi\u1edbi Vi\u1ec7t Nam – Trung Qu\u1ed1c n\u1eb1m \u1edf c\u1eeda s\u00f4ng B\u1eafc Lu\u00e2n, khi th\u1ee7y tri\u1ec1u d\u00e2ng l\u00ean m\u1ed1c c\u00e1ch b\u1edd h\u00e0ng tr\u0103m m\u00e9t, n\u00ean vi\u1ec7c tu\u1ea7n tra b\u1ea3o v\u1ec7 bi\u00ean gi\u1edbi tr\u00ean s\u00f4ng, bi\u1ec3n c\u0169ng c\u00f3 nh\u1eefng kh\u00f3 kh\u0103n ri\u00eang.<\/p>\n