It is once again the time of year when cities concentrate on opening new metro lines. This year, 11 cities are participating in this "year-end spree" (compared to 14 in both of the previous two years, based on statistics from the last half-month).
Currently, Chengdu has taken the lead in opening lines, while other cities have not yet officially announced specific dates. MetroMan has estimated the following version based on news and local patterns; this is for reference only, please refer to official announcements for final schedules.

Opened
Pending Official Announcement
- Xi'an Metro: Line 15
- Hefei Metro: Line 6
- Guangzhou Metro: Line 22 Remaining Section
- Shenzhen Metro: Line 5 West Extension, Line 8 Phase 3, Line 11 Hongling South Station Section, Line 13 Phase 1 North Section (Xili Railway Station temporarily deferred)
- Tianjin Metro: Line Z4 North Section (Isolated Operation)
- Nanjing Metro: Line 3 Phase 3, Line 10 Phase 2
- Beijing Metro: Line 6 South Extension, Line 17 Middle Section (Guangqumenwai Station temporarily deferred), Line 18
- Shanghai Metro: Line 18 Phase 2 (Jiangyang South Road Station temporarily deferred)
- Jinan Metro: Line 4, Line 6 East Section, Line 8, Jiyang Line
- Ningbo Metro: Line 6 (Out-of-station transfer at Cuibaili Station)