旧莫样旧心事
[jiù mò yàng jiù xīn shì]
'Do not say old things and old worries' refers to no longer discussing or caring about the previous experiences or troubles which are gone with the past time. On one side, this sentence wants to express a nostalgic feeling toward what once belonged; On the other hand, maybe trying to emphasize a desire to let everything go for a completely brand-new beginning without burden of the past memories.