thereupon
adverb formal uk/ˌðeə.rəˈpɒn/ us/ˌðer.əˈpɑːn/
随即，立即
immediately after something that is mentioned
He thereupon produced a knife and stabbed the assailant. 他立刻抄起一把刀刺向了袭击他的人。
关于那，就该事
on the thing that has been mentioned
Ask for a written order with your specifications printed thereupon. 要求提供书面订单并在其上具体写明要求细则。