However, before returning to work in the original company, I suggest you contact the personnel department or relevant departments of the company to understand the employment arrangements and related policies of the company for retired soldiers. Some companies may provide preferential employment or special preferential policies for retired soldiers, and some companies may require you to pass certain interviews or assessments before you can re-join.
In addition, if you have dissolved the labor relationship with the company or gone through the formalities of leaving your job without pay before joining the army, you need to negotiate with the company to join the company again. The specific situation needs to be determined according to the relevant regulations and policies of the company. I suggest you fully communicate with the company to understand the relevant policies.