string(311) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%AF%B7%E9%97%AE%E4%BD%A0%E5%AF%B9%E8%B7%A8%E5%A2%83%E7%94%B5%E5%95%86%E6%9C%89%E4%BB%80%E4%B9%88%E4%BA%86%E8%A7%A3%E5%91%A2%E6%80%8E%E4%B9%88%E5%9B%9E%E7%AD%94 => Received HTTP code 403 from proxy after CONNECT"
请问你对跨境电商有什么了解呢怎么回答
