Lui set a blistering pace with 253 in his opening game to lead Chinese Taipei's Fang Chih-Nan by 8 pins as debutant, Cullum Borck of Australia and a second Taiwanese, Chen Ming-Tang shared third spot.
The Hong Kong national kept his lead despite a moderate 218 in the second game. Hig team-mate, Jimmy Cheung narrowed the gap to 5 pins as he added 232 to his 234 opener. Cheng Hsing-Chao of Chinese Taipei and a third Hong Kong national, Mike Chan followed in third and fourth.
Another good game of 225 saw Lui stretched his lead slightly to 10 pins as the 17-year-old Aussie moved into second. Borck took over the lead after another superb game of 259 in the fourth. Lui slipped down to second despite a good game of 224.
Lui fought back with a stunning 279 in the fifth game to regain the lead and opening up a gap of 54 pins over Borck. And with another big game of 267 in the sixth game, the margin was extended to 78 pins.