What is the reason if the terminal handwriting is blurry?

But the first few words are clear,like this.

Hi @xiaofan,

In Theia we currently consume xterm in version ^4.16.0 which resolves to 4.19.0. The next stable version of xterm after that is 5.0. It seems it contains a number of fixes, for example this one regarding blurred rendering.

Edit: Created an issue for updating xterm: Update xterm to latest version · Issue #12870 · eclipse-theia/theia · GitHub

Okay, I understand. Thank you for your answer.