The Peshawar Circular Railway, included in CPEC in 2016, is an inter-regional commuter rail system which will connect the cities of Peshawar, Charsadda, Mardan, and Nowshera. The circular railway, in next phase, will be extended to Swabi and Dargai. In 2019, KP Transport and Mass Transit Department has signed a MoU with China Railway Construction Corporation Limited (CRCCL) to conduct the feasibility study of.
Source
http://cpec.gov.pk/project-details/44
https://www.thenews.com.pk/print/486713-mou-inked-for-peshawar-circular-railway-feasibility-study
http://en.ce.cn/main/latest/202001/21/t20200121_34173130.shtml