Specific instructions:

"Bi Tongzui"? It is a summer drink invented by the ancients, which began in Wei and Jin Dynasties and flourished in Tang and Song Dynasties. "Bitong Drink" is also called Bitong Cup, Lotus Cup and Lotus Lantern. It is to pick fresh lotus leaves to hold wine, then pierce the heart of the leaves to connect the stems and leaves, and then suck wine from the stems. Scholars call it "the wine smells like lotus, and the fragrance is better than water cooling".

Introduction to ancient books:

Yin Yan mentioned that Li Zongmin, the prime minister of the Tang Dynasty, gave a banquet with lotus leaves as the wine glass. Tie the lotus leaf full of wine tightly, then put it in a person's mouth, poke a hole with chopsticks and drink it. If you can't finish it in one bite, drink it again. Use the lotus leaf as a cup and drink it with chopsticks. Don't spill it, or you will be punished. Many people will be punished and everyone will be happy.

The drinking method with lotus leaf as cup first appeared in Cao Wei era. At that time, some people gave a banquet to drink, taking lotus leaves as cups, sticks through petioles, and handles as pipes for drinking, which was called "blue pipe drinking". According to the ancients, that feeling is "the wine smells like lotus, and the fragrance is better than water cooling".

Morphological characteristics and growth environment of lotus leaves;

Morphological characteristics of lotus leaves;

It is best to have big, clean and green leaves. The stem of lotus leaf is green, covered with small thorns, like an umbrella handle; Break the stem of the lotus leaf and there will be many connected filaments on the stem. Numerous micron-sized waxy papillae structures are attached to the surface of lotus leaves.

When observing these papillae with electron microscope, we can see that many nanoparticles with similar structures are attached to the surface of each micron-sized papillae, which scientists call the micro-nano dual structure of lotus leaf.

It is these tiny double structures that make the contact area between the lotus leaf surface and water droplets or dust very limited, so there is a phenomenon that water droplets roll on the leaf surface and take away dust. Water will not stay on the surface of lotus leaves.

Lotus leaf growth environment:

Lotus leaf is a perennial aquatic plant of Nymphaeaceae, which has roots and likes warm water, so water can't drown it. When the water temperature is not lower than 5℃, the seed lotus begins to germinate at 8- 10℃, the lotus root whip grows at 14℃, the lotus root accelerates to grow at 23-30℃, and the leaves and pedicels are pulled out to blossom. In the growing period, it needs sufficient sunshine and needs to grow in shallow water with a water depth of 50-80 cm and a small flow.