You need to go to Nanchang County Industrial and Commercial Bureau to apply.

According to my country’s Trademark Law and relevant regulations, the industrial and commercial administration departments at all levels are mainly responsible for trademark registration and signboard approval. Nanchang County Industrial and Commercial Bureau is the first-level industrial and commercial administrative department of Nanchang County. Its main responsibilities are to carry out industrial and commercial registration, maintain market order, promote economic development, and protect consumer rights and interests.

Approving signboards is a relatively complicated process, requiring applicants to provide relevant materials and information and pay corresponding fees and taxes in accordance with regulations.