Ratchanok into World C'ships quarters

The 2013 champion relied on her all court game to oust the Chinese for the second time this year including  the Asia Championships in April.

She lines up the next showdown with ninth seed Chen Yufei of China with a 0-1 head-to-head record against the opponent,

Tanongsak Saensomboonsuk meanwhile lost to world No 1 and top seed Son Wan Ho of South Korea 21-14 17-21 21-13.