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"Governments' long and effective efforts to curb emissions of air pollutants is the root reason for the improvement," the statement said.

"Global buyers have shown great interest in participating in the fair, although the global economy is still in a downward trend due to the COVID-19 pandemic," said Xu.

"Gao found out that due to geographical conditions in the places where the ethnic groups lived, people didn't have enough zinc in their diets, which led to high death rates of pregnant women. As a result, any healthy woman who could give birth was viewed as precious to a family. Therefore, the custom was developed to carry on the family line," Yuan says.

"For example, it is powerful enough to change the cosmetics industry and force them to make more water-based makeup products instead of oil-based ones for young ladies. The young females love to take selfies in the morning when their makeup is fresh and oil-based cosmetics would ruin a perfect selfie by making them look oily."

"Good milk must come from close to home," Jin Danjie, head of the Jinshan farm, explained that the world's dairy import and export map shows that in most countries the best fresh milk is largely locally produced.