How do you get rid of Chinese weed growing in the garden?

I'm not sure what the plant is, but generally to remove a plant that is invasive, you must keep it from releasing its seeds as well as dig it up, roots and all. Usually even pieces of root can start a new plant. So, by digging it up early in the season and bagging all of the pieces for removal, over a couple of years you should be able to be rid of it.

The Chinese weed is a very strong strain of marijuana. you should probably get rid of it before the police are notified and you go to jail.