Line S5 (Chengdu Metro)

• Line 1 Phase 3's Western China International Expo City station released a transit hub design, announcing Line S5's future station would be transferring to the Expo City station with Line 1, Line 6, and Line 18.^[1] Line S5 was to be located on the LG2 floor.^[2]

• Western China International Expo City station had completed the Line S5's platform and structural construction with all 4 lines in the station.^[3] However, it was later announced Line S5 would not to go to Western China International Expo City station, and would instead pass through Line 6's Qinhuangsi Station, and Line 19's Honglian Station.

• August 4: Chengdu and Meishan signed the "Chengmei Municipal Railway Line S5 Co-construction and Co-management Cooperation Agreement," detailing that Line S5 would have a branch line and a main line. The main line would be 50.4 km long (with the Chengdu section being 19.4 km and the Meishan section 31 km), costing 15.6 billion yuan, and the branch line would be 32.8 km, costing 9.7 billion yuan. The whole line was planned to be 83.2 km long and cost 25.3 billion yuan.^[4][5]

• September 26: Sichuan Chengmei Rail Transit Co., Ltd, the operating company of Line S5, was officially established. The company's shares are jointly held by Meishan State-owned Capital Invenstment and Operation Group Co. Ltd., and Chengdu Metro, which hold 54.8% and 45.2% of shares respectively.^[6][7]
• December 12: By NDRC's publication,^[8]《Chengdu-Chongqing Multi-layer Transit Plan》had been delivered to Chengdu and Chongqing, showing that the line starts at Honglian Station, Line 19, Tianfu New Area, Chengdu, and ends at Meishan East Railway Station (Metro & National Railway), Dongpo, Meishan. It also showed the line would pass through Science City, Legoland Sichuan, Black Dragon Pool, and Mindong New Area.^[9]
• December 29: Chengdu Metro published Chengdu-Meishan Line Field Assessment Bidding.^[10] The Assessment shows the line is 58 km long (Chengdu: 19.22 km, Meishan: 8.78 km), underground: 8.65 km, elevated: 43.49 km, ground level: 5.86 km. It also details the line's 12 stations, with Jiancha Depot and Meishanbei Depot, and 2 power centres.^[11]

• August 26: Line S5 started project bidding.^[12]
• September 26: Line S5 conducted a construction initiation ceremony at Qinghuangshi and Shigao Station.^[13][14]
• September 26: Line S5's bidding result is announced, with China Electric Power Construction Co., Ltd. as the winner.^[15]
• October 15: Fencing was finished for Shigao station, marking the start of the station's construction.^[16]
• November 18: Line S5's Min River Mega Bridge started construction.

• July 7: Station names were posted for the Chengdu section, and the public was invited to give suggestions.^[17]
• August 15: Station names for the Chengdu section were officially announced.^[18]

Line S5 will use 4-car Type-A trains, with a standard capacity of 756 passengers. The power system uses 1,500 V DC via overhead lines. The trains operate at 160 km/h max. There are 23 trains and 92 cars.^{[citation needed]}