一起走过快乐的旧时光一起想过未来的老时光
[yī qĭ zŏu guò kuài lè de jiù shí guāng yī qĭ xiăng guò wèi lái de lăo shí guāng]
This translates to 'We walked through happy old times together and thought about the future old times'. It expresses nostalgia and hopes for shared moments and future memories with loved ones.