China pledged increasing efforts to help migrant workers win urbanite status, removing restrictions in towns and lowering threshold in big cities, said a national plan unveiled on Sunday. The country promised to help migrant workers from countryside to settle down in cities, by fully eliminating restriction of household registration in towns and small cities and gradually easing restrictions in medium-sized cities, according to the 2014-2020 urbanization plan released by the State Council, China's Cabinet. Reasonable conditions for settling in big cities will be set, while population in mega cities will remain to be strictly controlled, the plan said. The plan also granted city services and public welfare to the migrants. In China, cities with population between three million and five million are defined as big cities, while those above five million are mega cities.