Never hear about china’s silver requirement though
What's China's silver requirement?
Europe didn't have much in raw materials that China wanted and China wouldn't trade for manufactured goods. So, most trade with China involved silver or gold. In an effort to address this trade imbalance, the British started shipping opium as a way to have another trade good for Chinese export.
This documentary is part of larger series with both chinese and western historians, and goes into detail and background leading up to the opium wars https://youtu.be/26AjcWuYfUE
That's how you win a trade war. Start a drug war on the side of drugs.