Yang and Li surprised India A's Manika Batra and Suthirtha Mukherjee, both ranked No. 30 and No. 60 in the world respectively, for the second time in two days to win the final 3-1 and earn USD 500 for their fine efforts.
The other three categories saw the hosts winning the remaining three gold medals and a major share of the prize money.
However, Manika and Suthirtha failed to pick themselves up in the face of a good, calculated assault by the two Chinese girls.
Manika started on a brave note, attacking from both flanks, to win her first two games against Anqi Li. But the Chinese, surprised by Manka's attacking game slowed down a bit to upset the Indian's rhythm.
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It seemed to have worked well for Li who took the next game, but a cautious Manika put an end to the Chinese design by winning the fourth to take the first rubber 5-11, 5-11, 11-6, 5-11.
With the doubles rubber too in their pocket, it was left to Li to take on Manika in her reverse singles. Manika had the measure of her opponent, leading 2-0 in the fourth rubber. But she lost her way with several unforced errors in the third game which Li took 12-10 to trail 1-2.