^The Vietnam guidebook: with Angkor Wat - Page 42 Barbara Cohen, Fredric M. Kaplan - 1993 "In 111 BC, the Han Dynasty completely annexed Nam Viet as a Chinese province called Giao Chi or Chiao Chih. The town of Luy Lau, southeast of present-day Hanoi, was the ancient capital of Giao Chi. Although subjugation meant having to ..."
^Rebuilding Religious Experience- Vietnamese Refugees in America - Page 20 Linh Hoang - 2008 "However, it was only after the Chinese came to Vietnam that the Buddhists erected a center at Luy-lau which was the capital of Giao Chi and was a popular place visited by many Buddhist missionaries. Luy-lau became a major Buddhist center ."