How did Chinese leaders encourage trade and foreign investment in the
Special Economic Zones?

Located on the mainland, the government of China grants its special economic zones (SEZs) ... In SEZs, "...foreign and domestic trade and investment are conducted without the authorization of the Chinese central ... For these, Chinese Paramount leader Deng Xiaoping coined the name "special zones" with reference to the .

Explanation:

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;