According to relevant national laws and regulations, the State Council decided to set up an investigation team to investigate the "April 29" particularly serious collapse accident of self built houses in Changsha, Hunan Province. The investigation team of the State Council is led by the emergency management department and participated by relevant parties. At the same time, authoritative experts in construction, safety and law are invited to form an expert team to provide professional support for the investigation. It is reported that the accident investigation work will restore the course of the accident, find out the cause of the accident, summarize the lessons of the accident, comprehensively and objectively identify the responsibility, put forward handling suggestions in a practical and realistic manner, seriously pursue responsibility in accordance with discipline, law and regulations, and give a responsible account to the families of the victims and the whole society in accordance with the principles of "scientific rigor, law and regulation, seeking truth from facts and paying attention to practical results" and "four not letting go". At about 12:20 on April 29, a self built house in Wangcheng District, Changsha City, Hunan Province collapsed, causing heavy casualties. (Xinhua News Agency)