Cai's pig blood stall is said to be an old-fashioned brand. The layout of their home is very antique, and the door is also posted with a couplet, which is very historical. Because it is summer, many people there are queuing up to buy winter melon tea. We also bought two cups, and it took a long time. It seems to be a cup of NT$30. It is sweet. It is said to be a Tainan specialty. The business is very good!