It seems that QQ can only sign less than 50 words, so it is impossible to write more. However, there is a way to write on space talk, and then light it and synchronize it with the personalized signature, but only the first 50 words can be displayed on the signature, and the rest are replaced by ellipsis. If a curious friend wants to see what you wrote, he should go to your space to see what you said.

In addition, after closing the input method, two punctuation marks are one byte, which can show you more words.

Others seem to have no good idea.