Beijing, Oct 3 (UNI) Novak Djokovic continued his China Open unbeaten run by defeating Bu Yunchaokete, while Mirra Andreeva and Aryna Sabalenka advanced to the third round here. World No.5 Andreeva swept past Chinese Yuan Yue 3-6, 6-0, 6-0 and moved into the next round after an unsatisfactory first set on Friday. Yuan successfully converted on her break point after long rallies and took the first set at 6-3.