Interior canals in Hoang Hai commune. Paragraph 1: From the well water to the sub -canal; Paragraph 2: From Dong 40 sluice after Phu Le; Paragraph 3: From the tribute to the eagle tree; Paragraph 4: From the multi -feathery, Mr. Tu; Paragraph 5: Repair the channel section from N21 to the N21 channel to the sub -channel