Hi,everyone.We are a company from China and we encounted problems in API Spec Q1 Quality Managment System perfromed.They who came from peer consider that the 3.1.21 'Serving' and the clause 5.7.1.2 Serving,which meaning is on-site related service acitivity.but we don`t think this. We consider that they are service activity associated with the product installment and most of contents of on-site service activity is belong to the content of API Spec Q2.As far,We still fell confused.So, we don`t understand correctly the meaning of 3.1.21 'Serving' term and the clause 5.7.1.2 'Serving" of API Spec Q1. We would appreciated it if you would help me figure it out.