Correct

牵线

/ qiānxiàn / 
Strokes

Definition

to pull strings/to manipulate (a puppet)/to control from behind the scene/to mediate

Example

As a Verb

manipulate or control (from behind the scenes); mastermind

1
Mùhòu
幕后
qiānxiàn
牵线

pull wires

As a Verb

act as go-between

2
Tāliǎ
他俩
tánliànài
谈恋爱
shì
是
wǒ
我
qiān
牵
de
的
xiàn
线
  
。

I acted as go-between for them to meet and fall in love.