File photo shows the night view outside the venue of the second China Import and Export Fair, also known as the Canton Fair, in Guangzhou, capital of south China's Guangdong Province, in October, 1957. Launched in 1957, the Canton Fair is held in the spring and autumn seasons each year. The exhibition is widely seen as a barometer of China's trade. (Xinhua)

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File photo shows China's first domestic truck brand Jiefang vehicles in the first China Import and Export Fair, also known as the Canton Fair, in Guangzhou, capital of south China's Guangdong Province, 1957. Launched in 1957, the Canton Fair is held in the spring and autumn seasons each year. The exhibition is widely seen as a barometer of China's trade. (Xinhua)

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File photo shows the medicinal herbs on display during the first China Import and Export Fair, also known as the Canton Fair, in Guangzhou, capital of south China's Guangdong Province, 1957. Launched in 1957, the Canton Fair is held in the spring and autumn seasons each year. The exhibition is widely seen as a barometer of China's trade. (Xinhua)

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Iranian purchasers select porcelain of China during the 44th China Import and Export Fair, also known as the Canton Fair, in Guangzhou, capital of south China's Guangdong Province,1978. Launched in 1957, the Canton Fair is held in the spring and autumn seasons each year. The exhibition is widely seen as a barometer of China's trade. (Xinhua/Huang Jianqiu)

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File photo shows staff members of China's home appliance marker Galanz at the 85th China Import and Export Fair, also known as the Canton Fair, in Guangzhou, capital of south China's Guangdong Province, 1999. Launched in 1957, the Canton Fair is held in the spring and autumn seasons each year. The exhibition is widely seen as a barometer of China's trade. (Xinhua)

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People visit the 125th China Import and Export Fair, also known as the Canton Fair, in Guangzhou, capital of south China's Guangdong Province, April 15, 2019. Launched in 1957, the Canton Fair is held in the spring and autumn seasons each year. The exhibition is widely seen as a barometer of China's trade. (Xinhua/Liang Xu)