Why did the Yangtze River suddenly stop flowing at 1342 and 1954?

1342 was the period when the Yangtze River was cut off during the Yuan Dynasty in China. Due to the long history, it is impossible to verify the authenticity of the incident. 1954 shortly after the founding of the People's Republic of China, the water level of the Yangtze River in Taixing section plummeted, which should be related to the underground rift caused by geological activities. In fact, these are all online rumors, and their authenticity needs further research. Moreover, the Yangtze River has a large water flow, so the probability of the Yangtze River being cut off is very small. It should just be a sharp drop in water level, which is described as cut off.

1342, originally the flood season of the Yangtze River, is most likely to flood. One day, people in Taixing woke up and found that there was no water in the Yangtze River. Everyone thought they had offended the river god and were worried. However, when the river dried up, there were some fish and shrimp at the bottom of the river, and people went down to catch fish. The people who were still in the river the next day were swallowed up by the resurgent Yangtze River water. This is a version circulated on the Internet. Linguistically, it is not a rigorous news report, and its authenticity needs to be verified.

1954 The Yangtze River stopped flowing, which was scientifically thought to be caused by geological activities, but the water level of the Yangtze River soon returned to normal. This ancient rift valley is little known so far and lasts for a long time, running through Jiangsu and Shandong provinces.

These two events, the Yangtze River cut off, are of great help to geologists in China to study the geological structure in China. It happens that these two places are near the most mysterious north latitude 30 on earth, namely the famous Qiantang River spring tide in China, Huangshan Mountain in Anhui, Lushan Mountain in Jiangxi, Emei Mountain in Sichuan, the Hanging Garden in Babylon, the Dead Sea in Jordan, the pyramids and the Sphinx in ancient Egypt, the "Vulcan Fire" mural in the Sahara Desert in North Africa and the Caribbean Sea.