Reference:

1. https://www.wapbaike.baidu.com/item/%e4%b8%ad%e6%b3%b0%ef%bc%88%e5%b4%87%e5%b7%a6%ef%bc%89%e4%ba%a7%e4%b8%9a%e5%9b%ad/17652681?adapt=1&fr=aladdin

2. http://www.chinanews.com/m/cj/2015/06-02/7316430.shtml

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