Sindhu took a four-point lead first up before Li fought back to get the first game level at 9-9. After the interval, Sindhu took control of the game. Although Li managed to save four game points in the end, Sindhu took the game 21-18.
Li started the second game on the front foot. Sindhu was trailing 6-2 at one point but once the reigning world champion got into her groove, there was no looking back. Sindhu raced into the lead and ended up winning the second game by a comfortable margin of nine points.
Sindhu's fellow World Championship medallist Sai Praneeth also booked a place in the second round with a hard fought three game win over Thailand's Suppanyu Avihingsanon 21-19, 21-23, 21-14. He will next face China's Lu Ghuangzu.
Earlier, Saina Nehwal was knocked out after a defeat to Thailand's Busanan Ongbamrungphan while mixed doubles pair N Sikki Reddy and Pranaav Jerry Chopra lost to German pair of Mark Lamsfuss and Isabel Hertrich. Reddy will next be featuring in women's doubles with Ashwini Ponnappa later in the day. Other Ind yet to play their matches are Parupalli Kashyap in men's singles and Manu Attri and Sumeeth Reddy in men's doubles.
( With inputs from IANS )