higgins and ding junhui were among a number of players who moved effortlessly into the last 16 of the china open on wednesday .
selby , who is gearing up for the defence of his world title later this month , continued to defy a neck injury to sweep aside fellow englishman elliot slessor with a break of 126 in frame four of their second-round clash .
ding , the home favourite and reigning champion in beijing , had two breaks of 86 in a convincing 5-1 victory against mark davis to set up a third-round meeting with mark williams .