时光有多老安好有多好
[shí guāng yŏu duō lăo ān hăo yŏu duō hăo]
Here '时光'(shiguang) means time. '安好(anhao)' has two levels of meaning, firstly peace and health; secondly wish each other all the best. So this nickname can either express one's appreciation towards time passing quietly and steadily, enjoying good conditions and a peaceful state of life; Or express hope: wishing everything stays peaceful and wonderful as always no matter how long time past.