Ubisoft are preparing to remove a whole bunch of aesthetic elements from Rainbow Six Siege in order to comply with the strict regulations of Chinese law ahead of the game's release in China.
Images of skulls, blood, knives, and slot machines are being removed, as well as other elements we've not seen yet. How this will affect areas like the casino on Yacht is a mystery as of yet, and how Ubisoft can claim that this won't affect gameplay when things like the slot machines are used as cover and produce noise that can obscure movement is a mystery to me, as well. Caviera, one of the Brazilian operators, has a skull painted on her face by default and her icon displays a knife. I don't know if Ubisoft plan to change these aesthetic elements, or how they'll change them if they do.
Ubisoft say they're rolling this out globally so they don't have to maintain two separate builds of the game, but they're also already planning on removing many cosmetic items for Chinese players (such as Jager's skull headgear) which means they'll be maintaining two separate versions anyway.
It's also worth noting that releasing a game that originally launched with no anti-cheat features and has consistently mishandled hackers in China will run the risk of killing Siege entirely. China is notorious for hackers and cheaters. The Chinese market is what destroyed PUBG, because too many players abandoned ship when the Chinese cheats joined in.
I sincerely hope Ubisoft rethink this decision and decide to create a separate build of the game for the Chinese market. I could get all political and say that Ubisoft shouldn't force Chinese government censorship on the entire world, effectively aiding and abetting an oppressive regime and expanding its influence, but I'm mainly annoyed by the prospect of the game becoming unplayable due to an influx of cheaters Ubisoft's system is absolutely not prepared to handle.