USB port failure: it may be that the data transmission part of the right USB port is faulty, while the power supply part is still working, so the mouse (which only needs power supply and simple data transmission) can be used normally, but the USB flash drive (which needs a larger amount of data transmission) cannot be recognized.

Driver problem: It is possible that there is a problem with the driver for that USB port, causing it to fail to correctly recognize or read devices such as USB flash drives, which require complex data exchange.

BIOS settings: Some laptops may have options in their BIOS settings regarding USB functionality, which, if not configured properly, can also result in specific types of USB devices not being used.

U disk compatibility issues: Although relatively rare, the possibility of compatibility issues between a USB disk and that USB port cannot be ruled out.

Motherboard issues: The USB controller on the motherboard may be faulty, affecting the ability to transfer data from a particular USB port.

Steps to resolve this issue may include:

Try using a different USB flash drive to confirm if the issue is with the flash drive itself.

Update or reinstall the USB controller driver.

Check your laptop's BIOS settings to make sure the USB settings are correct.

Contact Shenzhou customer service or a professional repairer to check if there is a hardware failure in the USB port or motherboard.

If the problem is recent, consider restoring the system to a previous restore point to see if the problem is caused by a software update.

Based on your situation, if other USB devices are experiencing the same issue on that interface and basic troubleshooting has been tried to no avail, it makes sense to seek professional technical support for more in-depth inspection and repair.