Hi JR
------DM-----------
ding ding xin xin
wei wei chou chou
Based on Mangpai, artistic field is because Wei and Chou "perform work" in the chart. Wei and Chou are Shi Shen (Eating God). Although Wei-Chou is a clash, this interaction is seen as "performing work". I put "work" in quotation marks because this is a Mangpai Bazi term.
Teaching is because Wei is also Seal (Resource) Tomb. Seal and Output performing work together is teaching.
Police and military: not likely, because you lack Qi Sha (Seven Killings).