Timeline Refresh
The Chinese pair scored a 16-14 victory against newly minted women's Olympic champion Vitalina Batsarashkina and Artem Chernousov at the Asaka Shooting Range.
Compatriots Yang Qian and Yang Haoran later combined to win the 10-metre air rifle mixed team event, beating Americans Mary Tucker and Lucas Kozeniesky 17-13 in the gold medal match.
The Russian Olympic Committee (ROC) claimed the bronze.
India got their men's Olympic hockey campaign back on track with a 3-0 victory over Spain, on Tuesday morning.
India forged ahead through Simranjeet Singh in the 14th minute and added another goal through Rupinder Pal Singh in the next minute after forcing a series of penalty-corners.
Rupinder Pal made it 3-0 from another penalty-corner in the 51st minute, his powerful drag-flick packing too much power and racing through the Spanish defence into goal.
Spain launched an all-out attack in the last five minutes, forcing a couple of penalty-corners, but were unable to breach India's defences.
India beat New Zealand 3-2 in their opening match and were thrashed by Australia 7-1.