Chinese state-run express rail delivery service China Railway Express says its now able to serve all the cities across China which are directly connected to the high-speed rail system.

China Railway Express director Huang Jian says they are now able to provide three-tiered delivery services to 505 cities across China.

"For economical services we are able to deliver goods within 72 hours, charging 10 yuan for the first kilogram. Prices for delivery within two days start at 17 yuan for the first kilogram. For the same-day delivery, the price starts at 130 yuan."

Customers which don't get their packages on-time don't have to pay for delivery.

China Railway Express began in 2014, and serviced around 100 cities at that time.

The company is a subsidiary of the China Railway Corporation, which is the former Ministry of Railways.

China is home to the world's longest high-speed train system, with tracks covering over 20-thousand kilometers.