"The boy was very strong," Chen said of his 18-year-old opponent, using the event to build up for the youth world championships later this year where he will represent Taiwan.
The Far North teenager was able to fall back on his fitness and experience to make it through the three three-minute rounds and emerge victorious.
The win in Taiwan caps off what's been a significant year for Chen in the ring, which includes winning his third New Zealand title and an Australian national open Golden Gloves title.
Chen also picked up a code award for boxing as well as the Excellence Award at the ASB Secondary School Sports Awards at the end of October (the latter presented to an athlete who excels in a sport not offered at secondary school level).
Last Friday he was presented with the Simon Bass Memorial Trophy as Kerikeri High School's overall sportsperson for 2016.
Chen is now undertaking high performance training once a month at the Super City Boxing Gym in Manukau - alongside Northland Boxing Gym stablemate Floyd Chadwick (from Honeymoon Valley) - and is well placed for selection to represent New Zealand at the 2017 Commonwealth Youth Games in the Bahamas next year.