An ultra-high temperature (UHT) metamorphic rock belt occurs in Jining-Fengzhen-Tuguiwula, central part of southern Inner Mongolia.
内蒙古中南部集宁—丰镇—土贵乌拉地区发育了一条超高温变质岩带。
Many of them did their business actively in cities north of Yanmenguan, such as Zhangjiakou, Duolun, Guihua, West Baotou, and Fengzhen.
经由雁门关北上的商人有很多活跃在张家口、多伦、归化城、西包头、丰镇等处。
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