Is there a legal basis for not allowing outdoor drying racks in the community? Please provide relevant regulations. ...

It is impossible for laws and regulations to stipulate the setting of outdoor drying racks, but the General Principles of Civil Law and Property Law stipulate some handling principles. What you are talking about is actually the handling of neighboring relations and the scope of the exercise of ownership rights. Article 83 of the General Principles of Civil Law stipulates that the neighboring parties of real estate should correctly handle the neighboring relations in terms of water interception, drainage, transportation, ventilation and lighting in the spirit of facilitating production, facilitating life, solidarity and mutual assistance, and fairness and reasonableness. If it causes obstruction or loss to the neighboring party, it shall stop the infringement, remove the obstruction and compensate for the loss. Your installation of outdoor clothes hangers will affect the beauty of the whole community and damage the interests of neighboring rights holders. The opinions of the community are reasonable.