When did 'western powers' invade China and drug a large percentage of their population between 1918 and 2018? What was the percentage of their population? What were the drugs? What was the purpose? Who did it? How did something that you say supposedly happened 100 ago effect a country 200 years ago?

This is an extraordinary claim that should require extraordinary evidence. You've shown no evidence of the statements you've made in this thread so far so I hope you'll change that up and provide us with some here. I'd be very interested in seeing some for this.