Citizens ride in Rongcheng County of Xiongan New Area, north China's Hebei Province, March 29, 2018. China is pressing ahead with the building of Xiongan New Area and Beijing's sub-center following strict standards, officials said Friday. The top-level design for the Xiongan New Area has been generally completed, with the planning and policy systems both established, Lin Nianxiu, deputy head of the National Development and Reform Commission, told a press conference. On Friday, four key municipal organs of Beijing moved their offices from the downtown area to the eastern suburb of Tongzhou District, the capital city's sub-center. Sui Zhenjiang, deputy mayor of Beijing, said that the municipality should steer the sub-center onto a path of sustainable development, building it into a district without "urban diseases." (Xinhua/Mu Yu)