Sure! Here’s the English translation of your paragraph:
I found that the daily precipitation data I downloaded from ERA5_Land is decreasing. For example, at 20:00 on April 13 it is 0.0010332143865525723, but at 21:00 on April 13 it becomes 0.001025199145078659. Why is this happening? Isn’t this supposed to be cumulative data? This causes negative values when I convert it into daily accumulated precipitation under UTC+8.