Premier Li Keqiang visited a construction site of a comprehensive transportation hub located in the south part of Changchun city, Jilin province on April 9.

The ongoing project includes subway, underground parking lot and underground commercial pedestrian system.

Premier Li commended the workers on the site as the heroes of city construction.

The underground facilities are invisible projects of building a city, however, only when such facilities are made sound, can a city be truly shining, he said.