wūchén
учэнь
у1 чэнь2
http://www.chinese-russian.com/zd/ci/26103
wúchén
у2 чэнь2
http://www.chinese-russian.com/zd/ci/118078
wǔchén
у3 чэнь2
http://www.chinese-russian.com/zd/ci/4853