This aerial photo taken on Sept. 10, 2023 shows the exterior view of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd., for Mexico City, in Zhuzhou, central China's Hunan Province.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo)

A guest from Mexico observes the interior of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo)

This photo taken on Sept. 9, 2023 shows the interior view of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

Workers inspect the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

Workers inspect the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

This photo taken on Sept. 9, 2023 shows the interior view of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

Guests from Mexico pose for photos in front of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

A worker inspects the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

Guests from Mexico observe the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

This aerial photo taken on Sept. 10, 2023 shows the exterior view of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd., for Mexico City, in Zhuzhou, central China's Hunan Province.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo) 

Guests from Mexico observe the interior of the first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City, in Zhuzhou, central China's Hunan Province, Sept. 9, 2023.

The first articulated light rail train customized by CRRC Zhuzhou Locomotive Co., Ltd. for Mexico City has rolled off the assembly line on Saturday. (Xinhua/Chen Zeguo)