In China, one of the most popular herbal remedies is wang lao ji or wong lo cat in Cantonese. Wang Lao Ji is said to be a product that was marketed and sold by Wang Zebang (named Wang Ji) from Heshan in Guangdong Province in 1828.
Currently sold as a herbal medicine, the ingredients are seven different types of Chinese herbal medicinal plants: "Water , white sugar, mesona, but hua, bu zha ye (microcos paniculata linn), chrysanthemum flowers, jin yin hua (Lonicera japonica thunb.), prunella vulgaris and licorice (dan hua does not refer to eggs, but it refers to apocynaceae species)
This is a seven-part series exploring the contents of Wang Lao Ji seven herbal tea at FB Liangcha-Herbal Tea.
One of the main herbs in Wong Lo Kat is Xia Kuo or Prunella vulgaris, which is commonly known as Cure, cure all, terrestrial, and a drug of the genus Prunella, a perennial herb found in Europe, Asia and North America, growing by spreading its roots underground. but in general from June to August
For healing, the whole plant is harvested when the flowers bloom and dried. The leaves and small flowers are all intended.
Healing everything is both edible and therapeutic and can be used in salads, soups and stews. Medical practitioners have all been used in elective medicine for centuries on almost every continent of the world, and for almost all the ailments.
- Plant components: Betulinic acid, D-camphor, delfinidine, hyperoside, manganese, oleanic acid, rosemary acid, rutin, ursolic acid and tannin.
- Medicinal properties: antibacterial, diuretic, antiseptic, convulsive, antiviral, astringent, carminative, diuretic, styptic and tonic. 
Clinical analysis shows that it has a bactericidal action, inhibits the growth of pseudomonas, Bacillus typhi, E. coli, Mycobacterium tuberculi. Therefore, its use as a second drug supports both internally and externally as antibiotics and difficult to cure wounds and diseases.