"not to worry" in Chinese (Simplified)
别担心不用担心
Definition
用来安慰某人，表示事情没问题，不用担心；类似于“没关系”或“不用担心”。
Usage Notes (Chinese (Simplified))
非正式、友好表达，多见于英式英语。常用于安慰别人，不像直接说“don’t worry”那么强烈，可单独使用或附带解释。
Examples
Not to worry, I will take care of it.
**别担心**，我来处理。
The test is hard, but not to worry, you'll do fine.
考试难，但是**别担心**，你会做得很好的。
Your phone is safe, not to worry.
你的手机很安全，**不用担心**。
Dropped your keys? Not to worry, I found them.
钥匙掉了？**别担心**，我找到了。
Not to worry if you're late, we'll wait for you.
**不用担心**你迟到，我们会等你的。
You forgot your lunch? Not to worry, I brought extra.
忘带午饭了？**别担心**，我带了多的。