World champion Selby eased into Sunday's final with a 9-3 victory over fellow Englishman Martin Gould, and Allen's success against Bingtao was every bit as impressive.
World number 10 Allen enjoyed breaks of 105, 102, 90, 72, 70, 64, 55 and 50 to maintain his push for a fourth ranking victory to add to his success at the World Open in 2012 and 2013, and his Players Championship title last year.
British Open
'Clearly I've been the best' - Trump slams ranking system as Selby set for number one spot
18/08/2021 AT 14:45
The 17-year-old Bingtao had enjoyed wins over Ronnie O'Sullivan and John Higgins in reaching the final.
But he struggled to cope with the scoring power of the Northern Irishman, who sped to the four frames and the final five after his opponent had briefly threatened to recover by winning frames five and six with breaks of 73 and 98.
The winner of the best-of-19 frames final on Sunday earns a cheque for £150,000.

Eurosport Player One Year Pass for just £29.99

Scottish Open
'Contractual issue' sees 2021 Scottish Open moved to Wales
18/08/2021 AT 08:24
World Championship
'Phenomenal Selby stopped Murphy playing in final' - White
04/05/2021 AT 09:04