Is it illegal to close the balcony railing and remove it?

Legal analysis: not illegal. Many people have to tear down the old railings and install new ones when decorating.

Legal basis: Article 22 of the Property Management Law of People's Republic of China (PRC), before selling the property, the construction unit shall make a temporary agreement on the use, maintenance and management of the property, the interests of the owner, the obligations that the owner should perform, and the responsibilities that the owner should bear in violation of the convention.

The temporary owners' convention formulated by the construction unit shall not infringe upon the legitimate rights and interests of property buyers.