
Japan’s Chiharu Shida and Nami Matsuyama bagged bronze after beating Malaysia’s Pearly Tan and M Tinaah earlier in the day.
The final was aggressive from the start, with a series of powerful smashes from Liu and Tan on the very first serve.
But Chen and Jia, who won 22-20, 21-15 are world No 1 for a reason and their rivals rank third.
It was China’s second gold medal in badminton at Paris, having won the mixed doubles final day.
The country has won 20 gold medals in the sport since its inclusion at the Olympics in 1992 in Barcelona.
Japan’s Shida and Matsuyama took bronze with a more comfortable 21-11, 21-11 win over Malaysia’s Pearly and Thinaah.