Why is the geographical location of Zhenjiang so important that Daoguang, thousands of miles away, was forced to surrender after being captured by the British?

After the fall of Zhenjiang, Daoguang surrendered, because Zhenjiang was located in the key section of the Beijing-Hangzhou Grand Canal. It can be said that most of the materials in the north need this grand canal system and are transported from the south.

At that time, Zhenjiang was also the key place of the transportation system. Once Zhenjiang fell, it can be said that the grain transportation system under the entire Qing Dynasty territory will completely stop running. Moreover, there will be no food available in the northern capital, so once the British warships are stationed in Zhenjiang, everything can't be shipped out, so the end of waiting for Daoguang must be starvation or fleeing from Beijing, so Daoguang surrendered in Zhenjiang and signed an unequal treaty.

When defending Zhenjiang, the Qing army killed 4200 people and the British army suffered heavy losses. But unfortunately, there is a gap in technology. The Qing army finally failed and the Qing government lost Zhenjiang. In fact, the British are also very clever, because their purpose is not to completely rule China, nor to destroy China. The British, their purpose is to open trading ports through war. Thus, a person's eyes accurately captured the key place of the Qing court: Zhenjiang.

Moreover, the reason why the British army stopped sending troops to attack Beijing was that they were afraid of insufficient supplies. Moreover, the walls of Beijing are very thick and it is difficult for attackers to destroy them, so the plan to attack Beijing is a risky method, and the result of the attack is still unknown, so the British chose a more convenient method after weighing, that is, occupying Zhenjiang.