China's high-speed railway network is by far the longest in the world. As of December 2018, it extends to 29 of the country's 33 provincial-level administrative divisions and exceeds 29,000 km (18,000 mi) in total length, accounting for about two-thirds of the world's high-speed rail tracks in commercial service. Over the past decade, China’s high-speed rail network grew rapidly according to ambitious railway plans issued by the State. The "Mid- to Long-Term Railway Network Plan" ("Railway Network Plan") approved by the State Council in 2004 called for 12,000 km (7,456 mi) of passenger-dedicated HSR lines running train at speeds of at least 200 km/h (124 mph) by 2020. The 2008 Revisions to the Railway Network Plan increased the year 2020 passenger-dedicated HSR network target length to 16,