There is a ready-made nanosecond to second conversion, but it is not in Chinese, and it cannot express the way of saying nanosecond + millisecond + microsecond. However, your situation is very special. I suggest you convert it directly by intercepting the string. The 3 digits of a certain digit are nanoseconds, the next 3 digits are microseconds, and so on. This is hassle-free and efficient at the same time.
There is a ready-made nanosecond to second conversion, but it is not in Chinese, and it cannot express the way of saying nanosecond + millisecond + microsecond. However, your situation is very special. I suggest you convert it directly by intercepting the string. The 3 digits of a certain digit are nanoseconds, the next 3 digits are microseconds, and so on. This is hassle-free and efficient at the same time.