wūér
уэр
у1 эр2
http://www.chinese-russian.com/zd/ci/26079
http://www.chinese-russian.com/zd/ci/24984
wúèr
у2 эр4
http://www.chinese-russian.com/zd/ci/93980
wǔěr
у3 эр3
http://www.chinese-russian.com/zd/ci/29570