Simplify the following text for a Grade 8 native English-speaking person.
Original: A massive confiscation of opium by the Chinese emperor , who tried to stop the opium deliveries , led to two Opium Wars in 1839 and 1858 , in which Britain suppressed China and traded opium all over the country .
Simplified: Opium has caused many wars in China , such as the Opium Wars , because of heavy addiction to the drug .