牵线

牵线	qiān xiàn	to pull strings / to manipulate (a puppet) / to control from behind the scene / to mediate
牵	qiān	to lead along / to pull (an animal on a tether) / (bound form) to involve / to draw in
线	xiàn	variant of 线
线	xiàn	thread / string / wire / line / CL:条,股,根 / (after a number) tier (unofficial ranking of a Chinese city)