Even if wikipedia call the big circle boys a triad. Many article are not calling them a triad:

From the website of the parliament of australia:

« The Big Circle Gang, which is sometimes referred to as a 'Mainland-based triad' is a relatively new group. This group initially consisted primarily of former Red Army Guards who left China for Hong Kong. Big Circle Gang members are particularly violent, specializing in armed robberies of jewelry stores in Hong Kong as well as in heroin trafficking. The Big Circle Gang is not technically a triad, but most Big Circle Gang members are also members of various triad societies. Johnny Kon, a former Big Circle associate and convicted heroin smuggler, testified that he helped organize a group of Big Circle Gang members into a tightly organized and disciplined group known as the Flaming Eagles which expanded from jewelry store robberies in Hong Kong to a world wide heroin distribution network. All of Kon's Big Circle associates were also members of other triads. »