Can I be a soldier with a residence permit for 4 years?

Of course. Those who apply for registration in different places shall provide temporary residence permits for more than 3 years in accordance with the regulations. Other requirements are the same as normal registration. Those who have a residence permit for 4 years can serve as soldiers. Residence permit is an attempt made by some developed cities in China to learn from the "green card" system of developed countries, which has accumulated experience for China to formulate skilled migration measures and eventually form the national "green card" system of China.