WSJ说的

https://cn.wsj.com/articles/%E4%B8%AD%E5%9C%8B%E8%BA%8D%E5%B1%85%E5%85%A8%E7%90%83%E6%B1%BD%E8%BB%8A%E5%87%BA%E5%8F%A3%E9%87%8F%E9%A6%96%E4%BD%8D-19fd7a41?reflink=desktopwebshare_facebook&fbclid=IwAR2o8tYRA_ERKN_24GJRU-FqSs25ZIpTU_jCHWAHahxfzZ2UhBtVQYIAZeY