This is not something I've done, but you might want to give it a go.
Go to wf_context table and find your workflow and open the record.
There is a "Workflow Executing Activities" related list. Find the wait for activity and change the state to Finished and see if that makes the workflow move forward. It might not, but it's worth the try. If it works, you could potentially do this from a list to every identical activity related to that workflow.

I modified the record in Workflow Executing Activities to finished, but it did not work。

A shame. If you feel like testing more stuff, you could take a look at how it works in a correct scenario.
I think it practically deletes the whole record from the "running" related list and creates a new one in the transition history or something similar.

I did some digging and there's an article about retriggering a stuck acitivity
https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0713154

Based on the guidance there you could try messing with the activities and see if you can force the next activity to trigger?

Kinda weird that SN doesn't have a "skip" option for activities.

@Chuck Tomasi 

Could you give me some advice, thanks