What does "which" refer to in the following sentence?
These comic strips aren’t funny at all, which isn’t an easy thing to do, either.

Does the sentence mean it's not an easy thing to draw funny comic strips?

Question

What does "which" refer to in the following sentence?
These comic strips aren’t funny at all, which isn’t an easy thing to do, either.

Does the sentence mean it's not an easy thing to draw funny comic strips?

Answer

"Which" means the comic strips aren't funny.意思是说连环画一点都不搞笑，这也真不容易。这应该是种反讽的语气。

Answer

It sounds to me like they're saying that it's hard to make a comic strip that isn't funny at all.

In other words: The person thinks that making a comic strip that is even a tiny bit funny should be easy to do.