Yongan 1 was drilled to a TD of 3,999m MD in the Carboniferous interval and was suspended for further evaluations on 2 December 2019, after having been spudded on 17 June 2019. The oil and gas exploration well was targeting the Permian Changxing and Maokou formations with the objective of exploring the oil and gas potential of the central Jinggu-Mengla Sag, Lanping Simao Basin. Yongan 1 is in the Sinopec operated Jinggu Sag Block in the Yunnan Province. 
Yongan 1 was drilled to a TD of 3,999m MD in the Carboniferous interval and was suspended for further evaluations on 2 December 2019