My son retired from the army and now runs a convenience store in his garage on the first floor. How can he write applications like real estate?

My son has retired from the army and now runs a convenience store in the garage on the first floor of his home. When he writes an application for the property, he can indicate his status as a retired soldier. According to relevant information, retired soldiers who are self-employed and engaged in self-employed need to indicate their status when they enjoy preferential tax policies for tax declaration, and keep the Retired Soldiers' Certificate of China People's Liberation Army, Retired Military Officers' Certificate of China People's Liberation Army or Retired Soldiers' Certificate of Chinese People's Armed Police Force and Retired Military Officers' Certificate of Chinese People's Armed Police Force for future reference.