Southwestern Frontier in China

• 中国西南边疆

Southwestern Frontier in China的用法和样例：

例句

1. The southwest frontier ethnic regions of the country have economically lagged behind their counterparts in the east regions because of geographical and historical reasons.
   西南边疆少数民族地区由于地理和历史等诸多的原因，经济发展水平远远落后于东部地区。