The handling capacity of the second largest port in northeast China, Yingkou Port has broken the 100 million-ton record. Which means there are currently ten 100 million-ton ports in China.
The other nine 100 million-ton ports are in Shanghai, Ningbo, Guangzhou, Tianjin, Qingdao, Shenzhen, Qinhuangdao, Dalian, and Rizhao.
This is still some way behind the United States which appears to have 51 of them. The United States are measured in short tons. There are two measurements (more when you add metric) : the long ton, which is 2,240 pounds, and the short ton which is 2,000 pounds.
Thus we are only talking about a potential difference of 25%. Which would, worse, case, bring the US figure down to, say, 38 ports. Still some considerable way ahead of China.