This is a question of full angle and half angle. Full-width numbers and symbols account for 2 bytes, and half-width numbers account for 1 byte. For a computer, half angle 1 and full angle 1 are completely different words. You can compare:

1234567890

1234567890

Usually, in this case, I will replace it. I'll change it ten times, from zero to nine.

Press CTRL+H, you can directly copy a copied character, such as 9, replace it with a half-width 9, and then replace it one by one. Just change all ten numbers.