The third in the series of Chonqing subway ads encouraging moderate smartphone usage is a play on the meeting of 刘备, 关羽 and 张飞 in the Romance of the Three Kingdoms story (三国演义).
In the legendary meeting, the three strangers take an oath to become brothers, and make a pact to die on the same day ("不求同年同月同日生，只愿同年同月同日死"). In the ad, instead of swearing to die on the same day, the three men express a desire to play on their phones on the same day ("却想同月同日玩手机"). In the third sentence the ad asks, if in future people become mere internet friends rather than true brothers ("桃园侠士变手机挚友"), will the kind of loyalty as showed in the story ever have a chance of existing? ("肝胆相照却成为过去？")
It ends by encouraging intelligent use of smartphones ("请合理正确使用手机") for the sake of your friendships ("为了自己的朋友和友情").