Lead Role pretend to be poor but actually rich

Taiwanese Drama Office Girl the ML needs to hide his identity and work at his father's company 

This is a Chinese drama I don't know the name he is a billionaire but pretend to be poor to secret is identity and girl is rich 

 VivekSingh:

A Chinese drama asio pretend to be poor to secret is identity occurred is rich first episode they sleep together but I don't know the name