A water system from more than 3,600 years ago     1     (discover) in Central China’s Henan province so far. This find will improve people’s understanding of the city design back then. According to local archaeologists (考古学家), one of the sections was built on a natural river channel, while the remaining two     2     (be) entirely artificial. About 540 meters of ditches (沟) were unearthed，with a     3     (wide) of about 12 meters at the widest point, and a depth of roughly four meters at     4     (it) deepest point. Ruins of the city covered about 25 square kilometers, and it is believed to be a former Shang capital     5     (construct) by Emperor Tang, the first emperor of the Shang Dynasty.

In one of the ditch sections, archaeologists found artificial open channels and stone facilities for water diversion,    6     (indicate) that in the early Shang Dynasty, there had already been complex functional design of the water system.    7     (remain) of handicraft workshops for copper (铜) casting and making bone objects were also found. The ditches were connected with ponds and gardens in the northern parts of the city,    8     means that water in the system supplied not only production and life in the city, but was also used for landscaping of the city.

Discovery of this water system enhanced our understanding of     9     layout of the ancient city, which is     10     great significance for in-depth study of city planning and functional zones division in the early Shang Dynasty capital.