Some new ham radio operators who have just received their licenses and purchased equipment are interested in using local repeaters, but they are likely unaware of the propagation characteristics and coverage ranges of different frequency bands (and whether 438500 is used by anyone).
(Especially when there are no other options available, such as trying to establish a local repeater using a 5W handheld radio and the original antenna in a small town with limited power, which is unlikely to be successful)
Publishing the approximate location of the repeaters allows new users to try connecting from as close to the transmitting site as possible, which can reduce trial-and-error costs and prevent beginners from losing interest prematurely.

There are a few amateur radio enthusiasts in Guangxi who have created their own versions of the Gaode Maps app. However, the number of repeaters included is relatively small. In addition to providing repeater locations, some ham operators also mark their own positions and listening frequencies on the map.
However, to be honest, I'm quite worried about finding a suitable repeater location and then carrying out actions such as interfering with network cables or power lines. It's important to protect against malicious actors.