Hans your smile,had been flurried my time passag.谢谢你的微笑,曾慌乱过我的年华。
Never frown, even when you are sad, because you never know who is falling in love with your smile.
Do not deceive me,you knew even if your lie I all can believe。不要骗我,你知道即使你的谎话我都会相信。
The last part is probably the Duwusiren have changed.睹物思人的后半句大概是物是人非。