Question for the long timers out there

A question for you long-timers out there:

Quoted from their web site www.tcmvd.gov.tw

The ROC driving license of a foreign resident is valid for the same period as that person’s Alien Residence Certificate. Before the driving license expires, one must first extend his/her period of legal residence. He/she can then extend the driving license at an appropriate Motor Vehicle Office without applying a new driving license. [b]However the accumulated total period of validity of a driving license can’t exceed six years. [/b]

My question: Does this mean you have to sit the test all over again, or can you renew it another way?

You don’t have to resit the test. You just renew the license.