string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%AD%BC16%2C%E6%AD%BC11%2C%E8%8B%8F27%2C%E8%8B%8F30%E7%9A%84%E5%8C%BA%E5%88%AB => Failed to connect to 101.89.143.195 port 38205: Connection refused"
歼16,歼11,苏27,苏30的区别
