I lent him the money for old times’ sake.

念在旧日的交情，我给他了。

It's good to take up the threads of our old friendship after such a long absence.

时隔这么久之后重新恢复我们的老交情, 这很好。

The character of the pine and cypress is shown in frigid winter;the sincerity of one’s friend is shown in adverse circumstances.

岁寒知松柏,难见交情。