This is the Mahjong Key Cap: wind and dragon series. Wind series are winds from all four directions that can be mounted on the Arrows in four directions of the keyboard.

（这是麻将键帽：风牌和箭牌系列，风牌可以安装在键盘的方向箭头上）

Dragon series can be installed at the keys you like

（箭牌可以安装在你喜欢的按键）

I have separated the colors in the 3mf file. If you download the stl file, you need to split it into parts in the slicing software and color it separately.

（我已经在3mf文件里分色，如果下载stl文件，需要你在切片软件里面拆分为零件，分别上色）