The three types of cities for exclusive commercial loans for the military include:

1. Cities where national defense science and technology industries and military scientific research units are located: These cities are where military industrial enterprises and R&D institutions are located, such as Beijing, Shanghai, Chengdu, Nanjing, Harbin, etc.

2. Cities where military regions and military training bases are located: These cities are where military command institutions and training bases are located, such as Shenyang, Nanjing, Guangzhou, Jinan, etc.

3. Cities where key border defense and peripheral security areas are located: These cities are border cities or cities with important strategic positions, such as Shenyang, Changchun, Haikou, Urumqi, etc. The third category of cities for military-exclusive commercial loans refers to cities where relevant units of the Chinese People's Liberation Army and the Chinese Armed Police Force are located, as well as cities where military-industrial enterprises are located.