Chong, who won the 2013 Asian Youth Singles gold medal in Hong Kong, kept his lead despite only kc=nocking down a lower second block of 1037 for a 10-game total of 2209. Indonesia's Diwan Rezaldy and 2006 Doha Asian Games Doubles gold medallist, Hassan Alshaikh of Saudi Arabia had tied second spot with 2187.
But in the final Squad D, Indonesia's Sukinto Wijaya added 1143 in his second block to take his 10-game tally to 2191, pipping Rezaldy and Alshaikh by four pins to clinch second spot. Rezaldy and Alshaikh had to settle for third.
The top female qualifier was 2017 SEA Games Doubles gold medallist, Sharon Limansantoso of Indonesia who occupied fifth position with 2180. Squad B leader, Ryan Lalisang of Indonesia finished in the top 10 with 2113.
Nora Lyana Natasia of Malaysia, who finished second to Lalisang tied 13th position with Squad C leader Rudy Goenawan of Indonesia.