Introduction to the 4th edition: The 4th US Immigrant Investor Forum (USIIF) was successfully held on October 16-17, 2015 at RITZ-CARLTON SHENZHEN CHINA. 23 regional centers and immigration law firms from the United States, as well as over 100 immigration agencies from various parts of China, attended the conference. 第4届的简介： 第四届美国投资移民论坛（USIIF），于2015年10月16日-17日，在RITZ-CARLTON SHENZHEN CHINA成功举办。 来自美国的23家区域中心和移民律师事务所，以及来自中国各地的一百多家移民中介公司，参加了会议。