Lee, who had a 75 pin cushion from a 1249 first block series, added a second 5-game series of 1236 to lead the field with a total of 2485 including a 278 game in the ninth and his second 300 in the tenth game in Squad D.
The 21-year-old Korean National Sports University student, who won the Men's Grade A Masters finals two days ago, finished 163 pins ahead of Youth Under-21 and Men's Grade A Masters champion, Park Geon Ha in second with 2322.
Squad C leader and top local qualifier, Atchariya Cheng took third spot overall with 2225. Singapore's Darren Ong Wei Siong, who was second to Cheng, totaled 2214 for fourth position while 2017 PBA-WBT World Bowling Tour Thailand champion, Yannaphon Larpapharat of Thailand rounded out the top five with 2202.
The top three overseas pool qualifiers, Lee, Park and Ong and Atchariya, Yannaphon and 2014 Asian Games Singles bronze medallist, Sithiphol Kunaksorn were the top three local pool qualifiers and will skip Round 2 finals.