China is the country of origin of tea, and only China has tea in the world, while western countries regard drinking tea as an indispensable part of life.

Therefore, tea trade occupies a very important share in China's exports.

Thus forming a huge trade surplus,

In that year, 1/3 of the world's silver flowed into China.

In order to change this situation and earn foreign exchange, western countries used opium.

So there is a saying that China's tea led to the Opium War.

It actually makes sense.