1) There will be slight yellowing after about one year, but there are some cases where there is no yellowing for two years. Depending on how much/how long the doll is exposed to ultraviolet rays, long-term expectation will also have an impact in a bright space.

2) The so-called bjd maintenance is not like the daily maintenance of human skin care products or the periodic oiling maintenance of machines, but proper cleaning, extinction protection and daily prevention of ultraviolet rays; Exposure to the sun, long-term exposure to strong light, supercooled/overheated temperature, etc. will all cause damage to bjd and cause rapid yellowing.

of course, I don't mean not to go out, but to minimize long-term contact with the sun.