What to do after i got Foreigner's work permit letter from people's republic of china ?

I am an Indian, I got a job into Chinese company. i went to china and submitted all my documents and medical report, company's legal documents everything they needed into government office. Now i am back to India and they have issued me a "NOTIFICATION LETTER OF FOREIGNER’S WORK PERMIT IN THE PEOPLE’S REPUBLIC OF CHINA", which says i can work in company for 1 year. Date of Issue is 11 July 2017 and it is valid for 3 months from Date of issue.
I really have no idea what i need to do next and as it says i can work for 1 year then from which day that period will be started ?

Thank you so much.