Can longan and lychee be used interchangeably to make tea?

Generally speaking, longan and lychee cannot replace each other when brewing tea. A detailed analysis is as follows:

Although both longan and lychee are tropical fruits, they differ in flavor and compositional characteristics. Lychee tea carries a fresh fruity aroma, with high sweetness and a slight tartness, delivering a crisp mouthfeel. In contrast, longan tea emits a warm fragrance, with mild sweetness and a rich texture, offering a smoother and denser sensation. There are also differences in their nutritional release: brewing lychee releases more moisture and fruit acid, while longan releases more amino acids and polysaccharides. These differences directly affect the flavor complexity and drinking experience of the tea infusion. Considering the specific flavor and texture requirements when brewing tea, substituting one for the other may compromise the original taste and quality, failing to meet consistency requirements for ingredient pairing.

Although they cannot replace each other, you may choose to use either one separately or combine them based on personal preference. Additionally, when brewing tea, it's important to control the quantity—using 5–8 pieces of each ingredient per serving is sufficient to avoid excessive sweetness. It is also recommended to choose fresh and dry ingredients, rinse them thoroughly before brewing, and pay attention to the tea's temperature while drinking to avoid scalding. If any throat discomfort occurs after consumption, consider reducing the amount used or switching ingredients.