qiēshí
цеши
це1 ши2
http://www.chinese-russian.com/zd/ci/72718
qiéshī
це2 ши1
http://www.chinese-russian.com/zd/ci/6287
qiěshì
це3 ши4
http://www.chinese-russian.com/zd/ci/2870
qièshì
це4 ши4
http://www.chinese-russian.com/zd/ci/111638