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"During the 'cultural revolution' (1966-76), it was hard to get books. I needed to wait for a week to borrow one and had only two days to finish reading it. I had many regrets because I hadn't finished reading most of the novels," he said.

"Daily maintenance plays a more important role than renovation in regard to protection," he said. "Archaeological research, as well as monitoring and warning systems, will also help."

"Electricity will eventually become mainly produced from nonfossil energy, especially renewable energy," he said.

"Exporting small goods by post is faster and cost-effective," said Lin Manyun with China Postal Express & Logistics Co Ltd.

"Every day is like a battle. Mistakes cannot be avoided. What we did right yesterday may not be applied today," he joked.