Legal basis: Article 93 of the Code for the Implementation of "123 19" Service Hotline of National Construction System strengthens organizational leadership and establishes and improves the responsibility system of service hotline. "123 19" is a unified special number for the national construction system to carry out public welfare services in the construction industry, which is common throughout the country. All localities should earnestly organize the implementation, clarify the responsibility system of the service hotline, clearly designate the lead unit, and coordinate and organize the relevant departments to standardize the work of the "123 19" service hotline. All localities applying for opening the "123 19" service hotline should conscientiously implement the relevant provisions of the Ministry of Information Industry, strengthen the management of information resources, and avoid redundant construction and waste of resources.