各人自扫门前雪，莫管他人瓦上霜/ 各人自掃門前雪，莫管他人瓦上霜gèrénzìsǎoménqiánxuěmòguǎntārénwǎshàngshuāngmind your own business
everyone should sweep the snow from their own doorstep and not worry about the frost on others' roof tiles; focus on your own affairs and do not interfere in the business of others