Lee, who rolled the first 300 of the tournament in the first block and a second 300 in the second block, added a 1215 third block series to finish an undisbuted leader with a massive 3700 total, averging 246.67.
His compatriot and winner of the Youth Under-21 and Men's Grade A Masters titles, Park Geon Hu ammased 3465 to take up second position. Squad B winner, Lin Pai-Feng of Chinese Taipei rolled the tournament's fourth 300 to clinch third with 3442.
The top three Koreans earned a bye and will automatically advance to Round 3 finals. Atchariya Cheng, who topped Squad C over three blocks, topped the local pool with 3289. 2017 PBA-WBT World Bowling Tour Thailand champion, Yannaphon Larpapharat finished second with 3179.
Joining the duo was 2012 Thailand Open champion, Surasak Manuwong in third with 3166. The top three local qualifiers will also automatically advance to Round 3 finals.