How to change my pdf pagenumber?

When I render a pdf , I just found the pagenumber at the top of each page.

How can I change the position of pagenumber to the bottom?

This is my YAML

pagenumber:  bottom 
# just did NOT work...
# I can't find any info  about pagenumber in official documents...

This is my PDF pagenumber( on top right )

###Anyone would like to help me? please, thank you :smiling_face_with_three_hearts:

sorry my 2nd picture can't be dispalyed.
cuz I am a new user, can't put more than one media block in a topic...

My guess is that there is a standard LaTeX command for this, not necessarily specific to the ctexart document class you are using but I've never run into it.

Could you supply that YAML in text rather than a screenshot? It would be much easier to work with.
Just copy the code and paste it between
```

```

Thanks