Who can talk about the geographical distribution characteristics of the trading ports opened in the Opium War, the Second Opium War and the Sino-Japanese War?

Geographical distribution is characterized by, from coastal to inland along the river,

The geographical position of the trading ports is all along the coast or along the river, with relatively developed economy, abundant resources and dense population, which is convenient for western powers to plunder raw materials and dump goods, and at the same time, it is also convenient for them to directly invade China and control China's economy and internal affairs.