Construction

Lê Hoàn's canal from Đồng Cổ to the Bà Hòa river

Finding the mountain road and the sea route to the south too hard, Lê Hoàn had a canal dug from the Mã river past Đồng Cổ mountain to the Bà Hòa river, completed in 983, the start of the waterway later called the Lê canal.

Meanwhile, elsewhere