- Mobile phone: +86 0 15611039483
- WeChat: changgua
- Email: services@extratrans.com
- Website: http://www.ExtraTrans.com
- Sina Weibo: 东方雅高
- Address: 北京市朝阳区南郎家园18号楼恋日国际1210室（邮编100022）
- Room 1210, Sun Thirsty Building, #18 Building, Nanlang Jiayuan, Chaoyang District, Beijing 100022, China