This is a tea blends originated from the silk road, it was invented by Chinese Muslims living in the area. If you go to Ningxia, a Hui* autonomous region. your local host will surely greet you with this unique tea. The tea is commonly served in a Chinese Gaiwan (a tea cup with matching lid and saucer).
The tea blends consists of eight ingredients, hence comes the name "eight treasure tea".

The ingredients in a cup are:
Jasmine green tea ---------------- 1 tsp
Chrysanthemum flower ---------------- 2 pcs
Red date ---------------- 3 pcs
Dried longan ---------------- 3 pcs
Walnut kernels ---------------- 2 pcs
Raisin --------------- 5 pcs
Sesame ---------------- 1/2 tsp
Rock Sugar ---------------- 1 pc
Put all the above into a Gaiwan, pour in hot water and steep for 3-5 minutes, a special cuppa is ready to serve.
You could also use dried apple pieces, rose bud, and orange peels to replace some chrysanthemum, red date and sesame. or experiment with novelty ingredients.
*Hui: one of China's largest ethnic minority groups, with a population near 9 million. The ancestors of Hui were 7th century Islamic Arabs and Persians, who came to China for trading through the silk road, latter settled down as permanent residents, and cross-married with Uygers, Hans and Mongolians. Gradually, those people formed their unique culture, with common belief in Islamic religion, distinctive customs and unique social system.

Hui people and their famous hala beef noodle stall. My neighborhood has two beef noodle stalls ran by Hui people, I usually patronize one of them, they are good at stew red meat, but too salty to my taste.
The men often wear white caps, and some elderly women cover their hair with scarves; they speak mandarin with strong accent, with some Persian/Arabic phrases in their dialogue.