Current online version of dynamics 365 and Microsoft dynamics 365 for Finance and Operations, Enterprise edition (July 2017)Update11，i want to use flow to connect the data，But I will not use flow to correspond to entity classes and fields，Please help me understand the entity class and the meaning of the fields correctly。
I need to understand and implement the：
1. customer
2. Contact person
3. Sales order
4.quotation
5. products
They are insert, update, delete operation。
I've tried many times, mandatory fields also have been no way to understand and success.
Such as：
*Entity name ：ContactPersons
*Associated party number ： I don't know how to correspond