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"For this purpose, current provisions that have constrained development of the market should be removed," Hong said.

"First, the Zhoushan Archipelago has a lot of islands, and transportation between them is underdeveloped, so the postal services are not so convenient there," he said. "Drone-based delivery is very suitable for them."

"Furthermore, China is shaping up to be the world's second-largest economy. These people have not experienced material shortage and they have no intention to do so," Feng added.

"Formula feeding is well known to increase the risk of obesity in children. Our findings suggest, however, that when breastfeeding mothers do not eat a moderate and healthy diet, there can also be increased risks of various health problems in the offspring," said Wang.

"Generally, the number of workers aged 18 to 64 is dwindling, while the older population is increasing, leading to a manpower shortage in some industries," he said.