Beijing will undertake a major restructuring of the capital government as part of a broader plan to create a giant urban corridor in northern China, officials said Saturday.

At the end of a Communist Party meeting, city officials said on the evening news that hospitals, wholesale markets and some of the city’s administrative offices would move outside the city center. Beijing is to limit its population to 23 million, slightly more than its current estimated population of 22 million, and reduce the population of its six core districts by 15 percent. Many important services will move to suburbs or neighboring Hebei Province, officials said.

The centerpiece of the plan will be an administrative center in the Beijing suburb of Tongzhou, a historic move that reverses decades of urban planning that wedged government offices into the imperial city center. The move will begin by 2017 at the latest, the Beijing party secretary, Guo Jinlong, said in a speech.

In addition, city officials said, 50 city hospitals will begin cooperating with hospitals in Hebei Province, and some will move important facilities to surrounding communities. The neurological unit in Tiantan Hospital, for example, will move to another suburb, Fengtai, by 2017, they said.