Kapur, who had five birdies and two bogeys, started on the 10th and had his first birdie on 11th and last one on the ninth, his closing hole.
In between, he gained shots on 13th, 17th and first and dropped bogeys on 12th and 18th.
Gaganjeet Bhullar, the other Indian in the field, struggled to three-over 75.
Meanwhile, 34-year-old China's Huang Wen-yi, who started playing golf at 22, grabbed the lead on the first day.
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Huang worked as a labourer and then a caddie before falling in love with the game, and his decision to pursue a career in golf looks a shrewd one after he carded eight birdies against two bogeys on a sun-kissed day in Shenzhen.
While Huang produced the round of the day, Challenge Tour graduate An enjoyed the shot of the day when he aced the par three eighth.