Liu Liqun, in his 70s, shows his collection of 70,000 advertising cards including coupons collected over six years in Taiyuan City, the capital of North China’s Shanxi Province. (Photo/CFP)
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Liu Liqun, in his 70s, shows his collection of 70,000 advertising cards including coupons collected over six years in Taiyuan City, the capital of North China’s Shanxi Province. (Photo/CFP)