Convert PDF to searchable PDF
For Chinese:
```
ocrmypdf -l chi_sim --deskew --title "yingshaoxo's pdf" --jobs 3 --output-type pdfa input.pdf output_searchable.pdf
```
For English:
```
ocrmypdf -l en --deskew --title "yingshaoxo's pdf" --jobs 3 --output-type pdfa input.pdf output_searchable.pdf
```
```
ocrmypdf -l chi_sim --deskew --title "yingshaoxo's pdf" --jobs 3 --output-type pdfa input.pdf output_searchable.pdf
```
For English:
```
ocrmypdf -l en --deskew --title "yingshaoxo's pdf" --jobs 3 --output-type pdfa input.pdf output_searchable.pdf
```