The Four Seas Gang (四海幫, or Si Hai Bang) is a triad society based in Taiwan. It includes mainland Chinese and their descendants who fled to Taiwan with the KMT. The Four Seas Gang has an estimated membership of over 5,000 in Taiwan. Its members have extended their influence to cities in the southern region of California. Its American constituents are a branch off of the original Taiwan society. There are also smaller factions that are merely street gangs, warring with other gangs of low notoriety. Four Seas Gang is active in alien smuggling in Southern California.