It is too late to grieve when the chance is past. 坐失良机，后悔已迟。

It is the unforeseen that always happens. 天有不测风云，人有旦夕祸福。

It is the first step that costs troublesome. 万事开头难。

It is no use crying over spilt milk. 覆水难收。

It is never too old to learn. 活到老，学到老。

It is hard to please all. 众口难调。

It is easy to open a shop but hard to keep it always open. 创业容易守业难。

It is easy to be wise after the event. 事后诸葛亮好当。

It is easier to get money than to keep it. 挣钱容易攒钱难。

It is better to die when life is a disgrace. 宁为玉碎，不为瓦全。