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As the temperature hits 39 degrees, two cheeky boys use lotus leaves to shield themselves from the sun in a pond in Wuhu, Anhui province, July 26, 2004. [Photo/VCG]

As the CEO of air purifier manufacturer Blueair, Mehmet Altinok quips that selling clean air is basically like selling ice cream, as they are both primarily seasonal products. One is a necessity in winter－especially in China－and the other is a summer treat.

As time goes by, ancient books suffer wear and tear and, in the worst situations, are damaged by worms and/ or gnawed by rats. What can be done to save such valuable books? Ancient-book restorers are able to solve the problem. Zhao Ling, who works at Hangzhou Public Library, is an expert in repairing ancient books. She puts much effort into repairing "weak" ancient books, so they can regain their beauty and be passed on to future generations. Zhao has oft been referred to as a person who "rescues history."

As with so many of her generation, she was made to marry early, with minimum education. She had children early, pregnancies were unplanned, childbirth was risky. Her husband, many years older, died a long while ago, leaving her a widow, unprepared to enter the workforce or properly fend for herself. Her children left the village for the city, adding to her isolation. This is the scenario many older women now face－with the added risks, burdens and effects of COVID-19.

As the city's home market remains sluggish, the transaction period is lengthened. In August, the transaction period reached 64.4 days that reached peak-days from 2012. Compared to the market, the transaction period lengthened to 25 days, data from Lianjia.