The Chengyu Ring Expressway (), officially the Chengyu Region Ring Expressway () and designated G93,Standardization Administration of the People's Republic of China. Mark rules of highway route and number of national trunk highway (GB/T 917-2017). September 7, 2017. is an expressway encircling the cities of Chongqing and Chengdu, Sichuan, in China. When complete, it will be in length.
The highway is named using the one-character abbreviations cheng and yu, for Chengdu and Chongqing respectively.
Route Clockwise from Chengdu, the expressway connects the following cities: Chengdu, Sichuan Mianyang, Sichuan Suining, Sichuan Chongqing Luzhou, Sichuan Yibin, Sichuan Leshan, Sichuan Ya'an, Sichuan Back to Chengdu
Currently, sections from Mianyang to Ya'an through Chengdu and from Suining to Chongqing are complete.
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