Who is the inventor of essential balm?

There are many opinions about the inventor of essential balm on the Internet, but there is no conclusive evidence. However, camphor in essential balm originated in China, and China people have always used herbs to make medicinal oil, so we can infer that its inventor should come from China.

Another convincing version is that the formula of essential balm may come from cool oil. The inventor of cool oil is Hu family in Fujian.

Hu Zushang is a traditional Chinese medicine practitioner in Xiamen. His youngest son, Hu Yu 1870, immigrated to Yangon, Myanmar, and opened a Chinese Yiguang named Yong 'antang. Later, Hu's second son invented the world's first all-purpose oil-cooling oil in Asia, and later became the best-selling all-purpose oil in the world.