Si Jiahui progressed in Championship League Snooker after winning Group 2 at the Mattioli Arena in Leicester on Tuesday.
The 22 year-old won five out of his six round-robin fixtures to comfortably qualify for the knockout stages in first place.
Si then twice fought back from behind to beat Chris Wakelin 3-2 in the semi-finals before repeating the same scoreline in the group final against Jak Jones.
The latter had established a 2-0 advantage with breaks of 73 and 58, but Si got on the scoreboard with a terrific 101 break in the third frame.
A run of 94 subsequently forced a deciding frame which the world number 13 duly won.
Prize Money
Groups 1–7
Winner: £3,000
Runner-up: £2,000
Semi-final: £1,000
Frame-win (league stage): £100
Frame-win (play-offs): £300
Highest break: £500
Winners’ Group
Winner: £10,000
Runner-up: £5,000
Semi-final: £3,000
Frame-win (league stage): £200
Frame-win (play-offs): £300
Highest break: £1,000
Si Jiahui joins Hossein Vafaei in the Winners’ Group of Championship League Snooker, which will take place at the beginning of next month.
Jones, who was also denied at the last hurdle of Group 1 on Saturday, will have a third opportunity to reach the final stages of the competition when he competes in Group 3.
The Welshman will be disappointed to have twice fallen just short, but he does have the consolation of making his first competitive maximum break.
Last year’s World Championship runner-up constructed a terrific 147 effort during his round-robin triumph over Chris Wakelin.
Jones, Wakelin, Ali Carter, and Robert Milkins will be back in Group 3 on Wednesday and Thursday alongside newcomers Ronnie O’Sullivan, Mark Selby, and Kyren Wilson.
Ryan Day and Pang Junxu have been eliminated from the tournament, however, after finishing at the bottom of Group 2.
Schedule
Group 1: January 3–4
Hossein Vafaei
Jak Jones
Pang Junxu
Ryan Day
Chris WakelinElliot Slessor
Gary Wilson
Group 2: January 6–7
Si Jiahui
Jak Jones
Ali Carter
Chris Wakelin
Robert MilkinsRyan Day
Pang Junxu
Group 3: January 8–9
Ronnie O’Sullivan
Kyren Wilson
Mark Selby
Jak Jones
Ali Carter
Chris Wakelin
Robert Milkins
Group 4: January 10–11
Barry Hawkins
Stuart Bingham
Jackson Page
Group 5: January 20–21
Judd Trump
Tom Ford
Neil Robertson
Group 6: January 22–23
David Gilbert
Jack Lisowski
Noppon Saengkham
Group 7: January 24–25
Xiao Guodong
Zhou Yuelong
Matthew Selt
Winners’ Group: February 3–4
Featured photo credit: WST
Wakelin went pointless in the match where Jones made a 147. The Welshman compiled breaks of 89 and 119 in the previous two frames.
Jones has made Eleven centuries across five days of competition so far. The fifth of these made him the 86th player to compile 100 career centuries.