Ronnie O'Sullivan started with a century as he cruised into the Fuhua Group China Open main draw - but Mark Selby had to dig deep.
The 'Rocket' added breaks of 67, 64 and 84 to his opening 110 in a 6-2 win over Ross Muir in his heldover qualifier in Beijing.
Selby trailed 2-0 to Chinese player Wang Yuchen but hit back with successive breaks in the 80s before eventually grinding his way to a 6-4 win.
Home favourites Ding Junhui and Liang Wenbo also made it into the tournament proper, respectively beating Michael Georgiou 6-2 and Rhys Clark 6-1, while Peter Ebdon dismissed Chang Bingyu 6-2.
In first-round action, Mark Williams continued his impressive form this season by beating Thepchaiya Un-Nooh 6-1 with two centuries and Mark Allen made three as he beat Noppon Saengkham by the same scoreline.
Former world champion Stuart Bingham beat Matthew Stevens, twice a Crucible finalist but now down to number 53 in the world rankings, 6-5 with breaks of 92 and 55 to come from 5-4 down.
Martin Gould, Luca Brecel and Ali Carter crashed out, all beaten 6-4 by Sam Craigie, Cao Yupeng and Gary Wilson respectively, but there were wins for Ricky Walden, Joe Perry, Ben Woollaston and Jack Lisowski.
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