Which of the following cities are opened as trading ports? In which treaty? Dalian, Qinhuangdao, Tianjin, Yantai, Qingdao, Lianyungang, Nantong and Shanghai.

Dalian Port Opening is a land lease treaty between Dalian and Russia (1893).

The opening of Tianjin port is 1860 "Beijing Treaty".

1858 Yantai was designated as Tianjin Treaty.

Treaty of nanking 1843.

These four trading ports were once opened.

Lianyungang was opened in 1933, which was the beginning of the discovery of the Eurasian continental bridge.

Qinhuangdao city has a route from Yantai to Qinhuangdao, which is a port.

Qingdao colonial Germans used it to contain the port of the Qing government in Yantai.

At the beginning of last century, in Nantong, Zhang Jian built a wooden trestle pier on the Yangtze River, and Nantong Port was opened since then.