Chen Jie is particularly concerned about the change of water level, which has his own considerations (the Qinhuai River is the only river in Jingnan that is connected to the Yangtze River, and the flood season of the Yangtze River directly affects the water level of the Qinhuai River). The time of the deceased's death was about two months, and the time of the crime was September 27, so the time when the deceased was sunk was around July 27, which was precisely the time when the water level of the Qinhuai River was the highest. The current water level is sixty or seventy centimeters, and in late July, the water level should be around two meters.

A few old people who often fish by the river said that in summer, they often fish in this area, and the fish nest is sprinkled just four or five meters away, the location is about the same as the location of the corpse, and the water depth is between one meter and eight to two meters.

The river at the scene of the crime is relatively wide, with nearby residents saying it is 150 meters wide. According to Chen Jie's visual inspection, it was indeed around one hundred and fifty meters.

One of the anglers, Zhu Laosan, said he had broken a few lines and lost a few hooks at the location. On the edge of the vegetable field, there is a road made of stones, this is obviously the place where the vegetable growers take water to water the vegetables, Zhu Laosan likes to stand here to fish, in summer, the river bank is overgrown with weeds, especially on rainy days and after the rain, the edge of the vegetable field is more muddy, and the feet stand on the stones are relatively clean, so he sprinkled the fish nest here, there is a three-story old-fashioned building on the opposite side of the river, Zhu Laosan will take this three-story old-fashioned building as a reference when he sprinkles the fish nest (because the fluidity of the Qinhuai River is very large, there are no aquatic plants in the water, and there is no duckweed, If you want to remember where the fish nest is, you have to find something as a reference), in addition to this reason, this fish nest is relatively easy to catch fish (the fish is willing to run here, will it have something to do with the corpse). Chen Jie stood on a relatively large stone and looked at the three-story old building on the other side of the river, and the location of the body was indeed on the line between the stone and the three-story old building. Zhu Laosan thought that the hook was hooked on a branch or something, so when he fished later, he tried to keep a little distance from that point. After that, there was no more disconnection and loss of hooks.

Coincidentally, Ouyang Ping and Liu Dayu really found a fishing hook on a few circles of wire (the wire that binds the chest and arms), and there was a large piece of fishing line on the hook, and the fishing line was wound around the wire.

The area on the north bank of the river is the so-called south of the old city, with one-color Ming and Qing dynasty buildings, blue brick walls, brown corridors, black tile roofs, warped roofs, lattice windows, dock walls, stone roads, shops with door panels, and stone steps outside the store. Outside the embankment is a row of old-fashioned houses, and through the alley between the houses, is the street, which is called Moling Road, and is mostly lined with shops, usually two-story brick and wood buildings, and occasionally three-story brick and wood buildings. These brick and wood structures are generally occupied by people on the top and business on the bottom. There are also a few shops that run hotels, and the streets are not wide enough to accommodate only a horse-drawn carriage.

Ma Minglong introduced, from Zhonghua Gate Castle to Liuyedu, there are more than 5,000 households, there are more than 100 shops, including three hotels, from the scene of the crime on the embankment, through an alley, diagonally opposite is a hotel, the name of the hotel is "Hongqi Hotel", this hotel is an old inn - it is also the largest inn nearby, there was in the Ming Dynasty, the original name was "Rugui Inn", in 1967, because of well-known reasons, "Rugui Inn" was changed to "Hongqi Inn".