Looks like MBC "Infinity Challenge"'s efforts of recruiting actor Jo In Sung has paid off! According to Jo In Sung's management company, SidusHQ, "Jo In Sung participated on the May 22nd 'rowing special' for 'Infinity Challenge'. Jo In Sung really enjoyed watching 'Infinity Challenge' and has always wanted to participate in the program." Back in April, the 'Infinity Challenge' team had sent banners and a rowing machine in congratulations for his discharge from the military, in hopes of recruiting him on the show. Netizens became excited after they noticed pictures on member Gil's Twitter of himself and Jo In Sung. With the management company's official statement, fans are delighted to hear that Jo In Sung took part in the filming of 'Infinity Challenge'. With the news of Jo In Sung appearing in 'Infinity Challenge', netizens stated, "'Infinity Challenge' is the best! Jo In Sung is the best!" "Just make Jo In Sung a regular cast" Source: Arts News