Lee sin variations/chromas on the Chinese server?

Was looking at the Chinese league website because I was helping someone with a translation and I saw that they have two variations/chromas for Dragon Fist Lee. https://lol.qq.com/act/a20180928DragonChroma/index.html https://i.gyazo.com/4d85ae52ede776a0f0467013258a939e.png I suppose they are for the Sapphire and Rose chromas, but I'm just wondering, why is this only specific to the Chinese server? The Sapphire one really looks badass.
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