The multi-picture upload function of mobile wap station h5 cannot select multiple pictures in UC browser. How to solve it?

I have a mobile website that wants to upload multiple pictures. When I did it on the PC, the function was OK. But after it went online, I opened it in UC Browser and found that I couldn’t select multiple pictures, so I couldn’t add more pictures. Uploaded, but I can select multiple images to upload using the browser that comes with my Huawei phone. How can I solve the problem that UC Browser cannot select multiple images?