Pingtan is expected to roll out more reform policies for overseas investors, including a relaxation in allowing them to make investments in more fields.
The signings came after Pingtan was included in a free trade zone plan in Fujian province, which triggered a new wave of business interest and investment.
The Chinese government has been authorized to ease investment rules in three new free trade zones (FTZs) after top legislature gave the go ahead during a bi-monthly meeting on Sunday.