The SAR duo, seeded third, fell 1-3 to Shi Xunyao and Han Feier in a 26-minute contest at the Taiyuan Binhe Sports Centre.
Doo and Ng made a slow start and conceded two games in a row in the best-of-five contest.
With their backs against the wall, they forced a game four but ultimately came up short, bowing out 6-11, 4-11, 11-6, 10-12.
Doo also stood on the podium on Saturday, when she and Wong Chun-ting finished runners-up in the mixed doubles after losing by three games to one in the final.
Hong Kong’s top-ranked women’s player will be among nine SAR paddlers competing at the upcoming ITTF World Team Table Tennis Championships Finals in London from April 28 to May 10.











