The 2nd in the series of public adverts encouraging intelligent of smartphones on the Chongqing subway, this one takes its inspiration from 红楼梦 (Dreams of the Red Chamber).
It asks whether the protagonists would have met if they had had phones to play with. The second sentence is a play on a traditional Chinese saying: "有缘千里来相会, 无缘对面不相逢" (if it is fated to be then it will happen even if separated by one thousand miles, if it's not fated to be then it won't happen even if you are face to face). Instead, the second part in the adverts reads "面对面来玩手机" (side by side but playing on their phones).
The first half of the third sentence is also a traditional Chinese saying: 有情人终成眷属 (if there is love between them then they will eventually become husband and wife). The second part is new and says that if they play on their mobile phones then they will remain strangers (玩手机终成陌路). It ends by exhorting the readers to use their phone responsibly (合理正确使用手机) for the sake of their loved ones (为了自己的亲人和爱人).