As the management of a property management company, what theoretical knowledge should be possessed?

Nowadays, the management and leaders of property companies are mostly laymen and experts, and the leaders act subjectively. They simply don't consider the hardship and difficulty of grass-roots work, and theory can't be combined with practice. There is no experience in communicating with the owners at the grassroots level, and the officers are rampant and the rights are highly concentrated. Although the laws and regulations of the property are not perfect, the leaders and management just do not act in accordance with the existing laws and regulations, and the leaders and management have the right. The responsibility is borne by the grassroots project leader, which leads to the excessive work pressure of the project leader. The person in charge of the project has no autonomy in economy and personnel. How can he have prestige among the employees below? How to carry out work? Leaders and management are afraid that the project leader will not be bound, so they don't delegate power and don't do it at all. This is the incompetence of the leaders and management of most property companies. Leaders and management feel tired at work, the project leader is tired, and the job responsibilities of the project manager are useless. For this reason, I think the state should formulate a policy: the property manager qualification certificates of the Ministry of Housing and Urban-Rural Development and Ministry of Human Resources and Social Security should be shown to the leaders and management of the property company, and those who fail the examination cannot be the department heads of the leaders and management of the property company. At present, the post of property manager is project manager registration certificate. If laymen and overstaffed managers intervene, the documents signed by registered property managers will be problematic. The crisis of trust between superiors and subordinates in property companies is prevalent, and the leaders are afraid that the employees below will fish in troubled waters. If the water is too clear, are there any fish? If the project manager has a good relationship with the leader, it will be lawless. I think the management of the property company must go to the grass-roots level to exercise, and only when they are competent can they enter the management. Theoretical knowledge must be combined with practice in order to change the situation that leaders and management are easier said than done, and call on the Ministry of Housing and Urban-Rural Development to issue policies that stipulate that they cannot be leaders of property companies in the near future without the certificate of property manager, and change the current management mode of "people-managed companies".