In addition to strong following of folk religions, fishing and winemaking, Matsu is known as very strategic piece of land for Taiwan. While Taiwanese government is managing the islands, they are located just few miles off the coast of Mainland China , with Fuzhou being the closest city. The island is covered in military outposts, forts, defence and cavern systems of various kinds since the beginning of Chinese civil war. While many of the forts and caverns are now defunct and open to the public and tourists, there are still many active military outposts, as the civil war never officially ended.
I have came to Matsu from chinese Fuzhou with a quick ferry, travelled around 2 largest islands of Nangan and Beigan. and then continued to main Taiwan island with yet another ferry few days later.