A woman sorts red roses at the Dounan Flower Trading Center in Kunming, capital of Southwest China's Yunnan province, on Feb 13, 2016.[Photo/IC]

At the center - Asia's second-largest flower auction center - hundreds of buyers are in fierce competition for flowers to sell on Sunday - Valentine's Day.

Four electronic displays are running simultaneously at the center, on which information about flowers, including their names, item number, ceiling price, quality and amount, is shown.

Buyers sit face to face in front of the four displays. Each has an e-auction keyboard and has to make a decision within five seconds.