y ▁scholar ▁Gu ▁Yan w u ▁( 1 6 1 3 – 1 6 8 2 ) ▁suggested ▁that ▁the ▁construction ▁of ▁the ▁Cloud ▁Platform ▁was ▁begun ▁in ▁ 1 3 2 6 , ▁on ▁the ▁basis ▁that ▁the ▁History ▁of ▁Y uan ▁records ▁that ▁a ▁U yg h ur ▁official ▁called ▁U d uman ▁( <0xE5> <0x85> <0x80> 都 <0xE8> <0xA0> <0xBB> ) ▁was ▁sent ▁to ▁car ve ▁d har an is ▁in ▁the ▁language ▁of ▁the ▁western ▁bar b ari ans ▁( i . e . ▁Tib et an ) ▁on ▁the ▁rock face ▁at ▁Ju y ong gu an . ▁ ▁However , ▁the ▁ins cri ptions ▁referred ▁to ▁here ▁are ▁probably ▁not ▁the ▁ins cri ptions ▁on ▁the ▁Cloud ▁Platform , ▁and ▁so ▁modern ▁scholar ship ▁dates ▁the ▁construction ▁of ▁the ▁Cloud ▁Platform ▁to ▁ 1 3 4 2 ▁or ▁ 1 3 4 3 . ▁ ▁By ▁the ▁early ▁M ing ▁D ynast y ▁( 1 3 6 8 – 1 6 4 4 ) ▁two ▁of ▁the ▁three ▁dag ob as ▁on ▁the ▁platform ▁had ▁col lapsed ▁or ▁had ▁been ▁dis m ant led . ▁ ▁By ▁the ▁reign ▁of ▁the ▁Zh eng t ong ▁Emperor ▁( 1 4 2 7 – 1 4 6 4 ) ▁no ▁dag ob as ▁remained , ▁and ▁the ▁structure ▁was ▁given ▁the ▁name ▁" Cloud ▁Platform ", ▁because ▁from ▁a ▁distance ▁it ▁seemed ▁to ▁rise ▁out ▁of ▁the ▁clouds . ▁ ▁A ▁project ▁to ▁restore ▁the ▁platform ▁was ▁carried ▁out