dōudū
доуду
доу1 ду1
http://www.chinese-russian.com/zd/ci/60385
dǒudù
доу3 ду4
http://www.chinese-russian.com/zd/ci/186230
dòudǔ
доу4 ду3
http://www.chinese-russian.com/zd/ci/93339