At the same time, the maximum resolution of Baidu signature file is 500*200. If it is too big, you can't see it clearly, so you should also consider the problem of clarity when choosing the signature file. Show your personality and mood at any time when using the signature file. However, the size of some signature files is too large, which makes browsing inconvenient, which is also a problem that many friends feedback. In order not to affect everyone's browsing the post content, the size limit of the signature file picture is now adjusted to: the width is less than 500px and the height is less than 200px. If the signature file exceeds this limit, it will be reduced in proportion to the original image. Signature files that have been published in posts will also be adjusted according to this restriction.

This is the official statement of Baidu Post Bar, if you want to make the signature file longer. Turn 200 down a little, not too big, just about 2.