string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BA%A2%E6%9D%89%E8%B5%84%E6%9C%AC%E6%9C%89%E5%A4%9A%E5%B0%91%E8%B5%84%E9%87%91%E5%9C%A8%E4%B8%AD%E5%9B%BD => Failed to connect to 101.89.159.206 port 38187: Connection refused"
红杉资本有多少资金在中国
