The description of this device sounds very similar to those of reputable brands.

IPL devices usually have a service life and stop functioning after a fixed number of flashes. The light has a limited lifespan. Adding an artificial limit would ordinarily be a bad thing, but IPLs are medical devices and its safer to kill the device prematurely than risk it failing in a way that endangers the user.

The skin tone chart is also common for IPLs. They work by heating hair follicles with a very bright light to stop them growing. There needs to be enough contrast between the skin and hair for that to work. Reputable manufacturers publish a similar chart.

The materials posted do not seem innately unreasonable. Seems pretty common documentation for IPL devices. I would not trust any medical device from aliexpress. Braun makes an LPL with a similarly limited lifespan and similar published skin tone chart.