投入 Traditional form: 投入 Pinyin (reading): tóurù Definitions: to throw into to put into to throw oneself into to participate in to invest in absorbed engrossed Characters: 投 - to pitch, to throw; to bid, to invest 入 - to enter, to come in; to join Traditional characters: 投 - to pitch, to throw; to bid, to invest 入 - to enter, to come in; to join