List of national, territorial, or regional railway lines David Feng has travelled on

As per the New Train Records

Numbers in square brackets indicate the order in terms of all kinds of train lines, not just national, territorial, or regional railway lines.

1. Beijing Cross-City Railway (China Mainland) [1]
   First journey westbound: 21 March 2022
   Complete journey westbound: 21 March 2022
2. Beijing-Harbin High Speed Railway (China Mainland) [5]
   First journey northeastbound: 24 March 2022 (Beijing Chaoyang – Miyun)
3. Beijing-Chengde Railway (China Mainland) [6]
   First journey southwestbound: 24 March 2022 (Miyun North – Tongzhou West)