Examples of the use of HR_MAINTAIN_MASTERDATA

Function implementation description：

Batch import of employee data into employee data through EXCEL，information 0000,0001,0002；

Problems encountered：

1、HR_MAINTAIN_MASTERDATA and HR_INFOTYPE_OPERATION, I don't know which FM is more appropriate to choose?

2、The personnel number is internal give the number, need how to realize?

3、HR_MAINTAIN_MASTERDATA Can provide a complete sample reference。

annotate：SAP HCM is self-taught, please help me with your help. Thank you