develop trend
The China Hot has become the trend of the world development !
The Sinomania has been the trend of the world developmentSinomania :the heated interest in study of Chinese culture
中文：人口老龄化是当今世界人口的发展趋势；
英文：Population aging is the development trend of the world's population today
日文：人口の高齢化は、今日の世界人口の推移
The China Heat has been the trend of the development of the world.
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