Can watermelon and preserved egg be eaten together?
Generally speaking, watermelon and preserved eggs (pi dan) can be consumed together, but the quantity should be controlled. The detailed explanation is as follows:

Watermelon, a common fruit, contains abundant water, vitamins, and minerals, and has a cooling effect to relieve heat. Preserved eggs are egg products made through a special process, possessing a unique texture and containing certain proteins and minerals. If an individual has no history of allergies to these foods, they generally can be eaten together. Additionally, the refreshing sweetness of watermelon complements the rich flavor of preserved eggs, enhancing the diversity of dietary experiences.
However, watermelon is cold in nature, and excessive consumption may cause contraction of blood vessels in the gastrointestinal tract, affecting the secretion of digestive juices. Meanwhile, preserved eggs contain a significant amount of alkaline substances; excessive intake may neutralize stomach acid and reduce its digestive function. Consuming large quantities of both together may easily lead to indigestion, abdominal pain, diarrhea, and other issues. Therefore, it is recommended to control the intake of both watermelon and preserved eggs to avoid excessive consumption.
It is also recommended to maintain a diversified diet in daily life and appropriately combine various types of food to ensure balanced nutrition and healthy eating habits.