"We stand in the middle of our commercial work and our work for social enterprises so we can balance out our resources," says Yu.

“我们立足于我们的商业目的和对社会企业的责任，所以我们能平衡我们的资源。”Yu说。

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So how do you know Gao Yu?

那你又是怎样认识高雨的呢？

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But the banks are not lending so they ran out of cash," said Yu Jingliang, owner of Zhejiang Pacific Paper Co.

但是银行现在却不贷款了，于是他们的现金流便枯竭了。” 浙江太平纸业公司的老板于景亮（音）说。

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So Ms Yu and Mr Li took more than two years to build their own, which today has 210, 000 titles compared with the 15, 000 available in a typical Chinese bookstore.

ECONOMIST: Selling books in China

And so it was left to scrappy entrepreneurs like George Yu to put the most intriguing devices on show.

FORBES: NODE Inventor Brings Tricorder-Style Device To The Masses