I am from Singapore 37 years old

and may be employed as an expat by a china local company at Zhejiang (Hangzhou) as their commercial general manager. My working experience is about 17 years and my academic background is Diploma in business marketing and Masters of Science in project Managment. I would like to know what are the requirement to obtain a visa to work as a commercial general manager before I proceed. Thank you so much for my lengthly enquirers.