"China-Caribbean builds ties for development and progress" “Ties” are similar to relationships. They are links or connections between people or organizations. If “ties” are strong, then the people or organizations are friendly to each other and work together for a common purpose. If "ties" are weak, it means that the people or organizations are not friendly to each other, or don't communicate and work together very much. Common types of “ties”: Financial ties: - UK cuts financial ties to Iran banks - Hong Kong strengthens financial ties with the Mainland Trade ties: - China protests: Fears rise over Japan-China trade ties - China and US meet over trade ties. - China's Shenzhen officials visit Cambodia to promote trade ties Diplomatic ties - South Korea and China celebrate 20 years of diplomatic ties - Canada cuts diplomatic ties with Iran Economic ties: - Working Together: Economic Ties between the United States and Mexico - Taiwan-China economic ties to deepen with yuan pact “Ties” can be getting better or worse. Ties getting better: - Strengthening ties - Growing ties Guangzhou has a large population of traders and businessmen from Africa, reflecting the growing ties between this southern major trade city and the resource-rich African continent Ties getting worse: - Weakening ties - Worsening ties

Here "Tie" means to bring into or have a close or effective relation; connect or coordinate between two countries.

It means something like relations or bonds between the two.