string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%8F%91%E5%B8%83%E5%9B%BD%E5%AE%B6%E6%95%B0%E5%AD%97%E8%B4%A7%E5%B8%81 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
第一个发布国家数字货币
