Where does China buy military weapons?

China has bought military equipment from Russia since the 1960, they then reverse engineered the equipment to gain knowledge about how it works and to be able to produce the weaponry themselves.

China is now one of very few countries than is capable of producing quality and sophisticated weaponry indigenously without any outside assistance thanks to the US-EU 1989 Arms Embargo which bans the sales of military weaponry to China. produces most of it's own weapons