Rai and Gangjee were the best with rounds of 75, nine shots behind Dodge Kemmer, the Asian Tour Qualifying School graduate from the United States.
Kemmer who lost his card last year only to get it back through the Qualifying School, shot six birdies and had no bogeys.
Three other Indians Ajeetesh Sandhu, Chiragh Kumar and Abhinav Lohan shot 76 each to be tied 77th, while Sujjan Singh playing on medical exmeption carded 79.
Lin Wen-tang of Chinese Taipei, a multiple Asian Tour winner and local hope Mars Pucay, who is searching for a first Asian Tour win, posted identical 69s to be among 12 players to shoot under-par at the challenging Wack Wack Golf and Country Club.
Also Read
Baek Seuk-hyun of Korea, who is ranked fifth on the Order of Merit, registered a 70 to share fifth place with Australia's Matt Jager, Daisuke Kataoka of Japan and Thai duo Rattanon Wannasrichan and Piya Swangarunporn.
"I get down on myself pretty easily. I'm trying to stay more level emotionally and that's easy to do when you are playing well. It will be interesting to see if I can handle my emotions when I hit some adversity this week," said the 25-year-old.