World No. 10 Sindhu took a little less than half an hour to dispose off Chinese Taipei's Hung Shih Han 21-19 21-15 in a women's singles match.
The second-seeded Indian had beaten Han in a trilling contest during the 2011 Vietnam Grand Prix Open. Sindhu will next take on Indonesia's Lindaweni Fanetri tomorrow.
H S Prannoy and B Sai Praneeth also entered the last-16 with contrasting victories at the Tap Seac Multisport Pavilion.
Prannoy will take on Chinese Taipei's Lin Yu Hsien, while Praneeth face Indonesia's Sony Dwi Kuncoro tomorrow.
However, it was curtains for P C Thulasi as the Indian women shuttler suffered a 12-21 17-21 loss to Hsu Ya Ching of Chinese Taipei in a 34-minute contest.