Which country's brand is Wang Laoji?

We in China already have the answer. In 1728, Wang Zebang (nicknamed Aji), the originator of Wang Laoji brand, created Wang Laoji herbal tea in Guangzhou, which has a history of 178 years. 1840 or so, this herbal tea of Wang Laoji sells well in the north and south of the country, even in Nanyang. This answer complements Hong Kong's answer.