The biggest benefits to register in FTZ are:

1.No foreign exchange limitation
2.No tariff taxes for goods coming in and out of FTZ
3.Lower restrictions to start up for most industries here, higher or impossible in other districts otherwise.

Introduction:
Since it was established on September 29, 2013, the China (Shanghai) Pilot Free Trade Zone (FTZ) has carried out institutional reform and innovation in areas of investment, foreign trade, finance and post-filing supervision to form a legal framework for investment and trade within the zone. It has adopted the negative list for investment management, simplified foreign trade supervision procedures, promoted financial system reform to realize RMB capital account convertibility, and advocated post-filing supervision as a way to transform government functions.

The State Council decided on December 28, 2014 to introduce the practices of Shanghai FTZ nationwide and established free trade zones also in Guangdong, Tianjin and Fujian. It approved the expansion of Shanghai FTZ by incorporating Lujiazui Financial Area, Jinqiao Export Processing Zone, and Zhangjiang High Tech Park, enlarging the FTZ from 28.78 square kilometers to 120.72 square kilometers to provide more space for reformtrials.(From http://en.china-shftz.gov.cn/About-FTZ/Introduction/)
You may consider registering your business in one of the areas covered by the Shanghai Pilot Free Trade Zone (FTZ).  

In 2013, restrictions for foreign investment was lifted on the following industry sectors:

Medical services; professional medical health insurance; leasing services and related business insurance; joint venture tourist agencies; foreign artist entertainment booking agencies; production and marketing of games; club and bar management; value-added telecommunications; joint venture education and training services; joint venture skills and vocational training services; joint venture construction companies; ocean freight; international ship management; joint venture banking; and, joint venture (<70%) HR agencies.

The sectors currently named as restricted or prohibited for wholly foreign investment are as follows:

Agriculture, forestry, animal husbandry and fishery; mining; manufacturing; production and supply of power; gas and water; construction; wholesale and retail services; transportation; warehousing and postal services; information transmission; computer services and software; finance, real estate, leasing and commercial services; scientific research and technical services; water conservancy, environmental and public facilities management; education, health and social industries; and, cultural, sports and entertainment industries.