“This is school, after all,” says Zhang Dong, who graduated recently after seven years studying at Tsinghua. “If we closed the door we could discuss hot topics.”

一名在清华就读7年的毕业生张东说，“毕竟这是学校，我们关起门来还是可以讨论很多热门话题的。”

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“This is school, after all, ” says Zhang Dong, who graduated recently after seven years studying at Tsinghua. “If we closed the door we could discuss hot topics.”

一名在清华就读7年的毕业生张东说，“毕竟这是学校，我们关起门来还是可以讨论很多热门话题的。”

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All this might sound a bit namby-pamby to pioneers like Sister Dong (who says that she hasn’t had a holiday for 20 years) and Zhang Yin (who boasts that: “My success came from my character”).

种种这些对于董姐（她称自己已经20年没休过假）以及张茵（她骄傲地称性格塑造了她的成功）来说，似乎太娇气了些。

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"Productivity Growth of the Non-Tradable Sectors in China", by Dong He, Wenlang Zhang, Gaofeng Han and Tommy Wu.

ECONOMIST: Sources and acknowledgments