legal ground
"Measures for the Assessment of House Expropriation on State-owned Land" Article 4 The real estate price assessment institution shall be selected by the expropriated person through consultation within the specified time; If negotiation fails within the specified time, the house expropriation department shall decide by organizing the expropriated person to vote or by random means such as drawing lots and shaking numbers in accordance with the principle that the minority is subordinate to the majority. Specific measures shall be formulated by provinces, autonomous regions and municipalities directly under the Central Government. Twentieth real estate price assessment agencies are selected by the expropriated person through consultation; If negotiation fails, it shall be determined by majority decision and random selection, and the specific measures shall be formulated by provinces, autonomous regions and municipalities directly under the Central Government. Real estate price assessment agencies shall independently, objectively and impartially assess the house expropriation, and no unit or individual may interfere.