Chang Lan fastener masana'antu co., LTD (nan gaba ake magana a kai a matsayin Chang Lan), bayan shekaru na ci gaba, da kamfanin da aka kafa a 2011, da aka sani da Chang He fastener factory, shi ne ya fi girma Yongnian misali fastener masana'antu Enterprises, da kamfanin is located A mafi girma cibiyar rarraba ga daidaitattun sassa - Hebei lardin YongNian, rufe wani yanki na fiye da 6000 murabba'in mita, kusa da 107 kasa babbar hanya da kuma beijing-Guangzhou jirgin kasa, da sufuri ne dace, Kyakkyawan wuri.
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