我下线你上线我活着你
[wŏ xià xiàn nĭ shàng xiàn wŏ huó zhe nĭ]
Translates awkwardly since it has some internet slang mixed up. If understood contextually, it can mean 'When I'm offline (unconscious/not around), you come online/enter (into existence) for me.' Expressing a sentiment akin to living for the one they love even when not physically present.