The workload of designing Chinese fonts is much greater than that of English fonts.
It takes more than 10,000 to design a set of Chinese fonts, while English only has 26 uppercase and lowercase English characters.
So many Chinese fonts only have commonly used fonts and are not fully designed. This is not the case with English fonts.
The design of the bold and bold font library you installed is incomplete and does not correspond to a certain character.
For example, the commonly used font library for bold and bold fonts has a hundred characters, and the character you entered happens to be outside of these one hundred characters.
There is no corresponding word for this word, so it cannot be changed.
Under normal circumstances, commonly used characters can be changed, except for some rare characters or ancient characters.
I hope my answer is helpful to you.