After 1949 China' s foreign relations became increasingly more complex as china established formal diplomatic relations with more nations, joined the United Nations (UN)and other international and regional political and economic organizations developed ties between the chinese Communist Party and foreign parties, and expanded trade and other economic relations with the rest of the world• After 1949 China's foreign relations became increasingly more complex as China established formal diplomatic relations with more nations, joined the United Nations (UN) and other international and regional political and economic organizations, developed ties between the Chinese Communist Party and foreign parties, and expanded trade and other economic relations with the rest of the world