His bogey-free effort allowed him to convert an overnight three-shot lead into a seventh Asian Tour win and second in the Chinese gambling enclave after his 2013 success over Lahiri.
"I knew he wasn't going to go away, he's a great player," Hend said of Lahiri.
"I wanted to come out, do my own thing, not worry about what the boys were doing. I knew they had to shoot a good score to catch me."
Back-to-back birdies from the eighth gave Hend breathing space and two birdie fours at the 13th and last kept the chasing pack at bay.
Lahiri, who endured a tough President's Cup debut in South Korea last week, started brightly with back-to-back birdies but costly bogeys on 12 and 16 gave Hend breathing room.
The 28-year-old eventually signing for a 66 and 17-under total to share second with compatriot Chiragh Kumar, who fired five birdies and an eagle for a valuable 65.
(Writing by Patrick Johnston in Singapore; Editing by John O'Brien)
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