屯垦

cóng kāi shǐ de tún kěn dào xiàn zài céng céng xiāng xù de lì shǐ liú xià le chéng shì bù duàn jiàn zào yǔ chóng jiàn de yí jì

从开始的屯垦到现在，层层相续的历史留下了城市不断建造与重建的遗迹。

Cities are constantly built and rebuilt; from the initial settlement to the present, successive layers leave traces.

tún kěn shù biān

屯垦戍边

station troops to guard the frontier and cultivate the frontier areas