Tonga's main island Tongatapu is dotted with small stores run by Chinese immigrants who are deeply resented by the local population. The Chinese were sold Tongan passports - one of those numerous Tongan government schemes to make money in a bankrupt country. The Chinese protect themselves by putting iron bars at the front of the store. When I bought a soda there, I was always served by one of the teenage children of the store owner who interrupted her/his studies to serve me.Fish sold right off the boat.
These ladies are trying to make a buck at one of the are tourist spots. If you wonder about their sweaters: it is winter in Tongatapu and the breeze from the ocean is fresh.