Enviko's ifite uburemere bwo gutanga umusanzu wumujyi wa tianquan

Sisitemu ya Enviko-iremereye (Ubuyobozi bwa Wim) bukabakwa ku muhanda mwiza w'igihugu 318 mu burengerazuba bwa Sichuan, bigira uruhare mu iterambere ry'ibikorwa remezo byubwenge.