Olympic bronze medallist Saina lost 16-21 14-21 to sixth seed Wang in a 41-minute match to registered her 11th defeat against the Chinese.
It was yet another semifinal finish for the World No. 8 Indian, having made it to the final four in the Swiss Grand Prix Gold, India Super Series and Malaysia Super Series Premier Open earlier in the year.
Saina was leading 3-0 in the beginning and despite a challenge from Wang, she managed to hang on to a 9-6 lead before the Chinese turned the tables and marched ahead after the interval, and then never looked back.
This was the last tournament before the Olympic qualification deadline of May 3rd.