I Bought a Vertical Ergonomic Mouse: Here's My Honest Experience
Due to work requirements, I spend a lot of time with my computer, leading to excessive use of the keyboard and mouse. I was suffering from severe "mouse hand," and recently my wrist started hurting slightly. I wanted to find a way to relieve this, so I purchased an ergonomic (vertical) mouse. Here is my review of the vertical mouse experience and whether it is worth buying.

Mouse Selection
There are very few manufacturers producing vertical mice. A search on JD.com revealed mostly unfamiliar brands. I excluded wireless mice (fearing instability) and silent mice (the Xiaomi silent mouse I used previously had a terrible feel with no click feedback). After eliminating these options, the choices were limited, and I found the "DELUX M618Plus" to be the most suitable option.

Purchase Link: https://u.jd.com/WwHV8Mn
Unboxing
The outer packaging is a cardboard box with specific benefits printed on it, haha.

The inner packaging was a bit poor; the mouse was just wrapped in plastic foam.

The accessories included only the mouse, a wrist rest, and a warranty card. There was no manual, which felt like something was missing.

Compared to a standard mouse, the overall size is quite large and may not be suitable for women.

Since there was no manual included, I took a screenshot from the product details page.

Usage Experience
At first, it felt a bit unfamiliar, but after two or three days, it became very smooth. My wrist pain was indeed relieved. To a certain extent, the vertical mouse is useful for preventing or alleviating mouse hand. However, there is one aspect I found unsatisfactory: selecting content with the left mouse button while scrolling down is less convenient than with a traditional mouse, and accidental touches are more likely.
This mouse is not expensive. Friends looking to prevent or relieve mouse hand can consider buying it. I personally tested it and found it effective. However, the warranty is only one year, so I hope it doesn't break after a year.
Purchase Link: https://u.jd.com/WwHV8Mn