echo https://ipinfo.io/country == $(curl -s https://ipinfo.io/country)        # 返回国家代码，例如 CN, DE, US
echo https://myip.ipip.net == $(curl -s https://myip.ipip.net)            # 国内站应显示无锡/电信（直连）
echo https://ipinfo.io/json == 
curl -s https://ipinfo.io/json           # 详情：IP、城市、组织
# curl ipinfo.io

echo