- vivo
https://vcl.vivo.com.cn/#/machine/picking - samsung
http://support-cn.samsung.com/App/DeveloperChina/Static/rdtp - xiaomi
http://testit.miui.com/ - devicepulse
http://www.devicepass.com/ - testin
https://www.testin.cn/business/landing/machine.htm - huawei
https://deveco.huawei.com/remotetest/devices/ - oppo
https://open.oppomobile.com/