AI program encourages diners to clear their plates

SHANGHAI－After finishing his dinner, Lin Xu opened a WeChat mini-program called "Clear Plate" on his phone and took a picture of the empty plates. He was then awarded 157 credit points after the image was uploaded and recognized by artificial intelligence.

"Users of the app can use their credit to buy gifts, such as books, cellphones and red wine, or to purchase charity meals donated to children in impoverished rural areas," Lin said.

The Shanghai citizen used the mini-program several times to record himself "clearing the plate. "He also joined a group of like-minded people who did the same amid the country's campaign to fight food waste.