Heart-protecting oil and Heart-protecting cream have been with Hong Kong citizens for more than a century, and can be said to be a must-have medicine for every family. In the early 20th century, Chinese and Western patent medicines were not yet popular in Hong Kong. Patients with wind, cold, cough, dizziness and stomachache need to first seek medical treatment from a Chinese doctor, and then go to a pharmacy to dispense medicine. This process is not only complicated, but also expensive. In view of this, the founder Mr. Guo Zhunan used his rich knowledge of Chinese herbal medicine to develop a topical medicinal oil that can relieve a variety of diseases, called "Heart-protecting Oil". Taking "One oil can keep the whole family safe. " means ". After the efficacy was confirmed, in 1907, "Baoxin'an Pharmaceutical Factory" was officially registered and operated in Hong Kong, with its first store located on West Street, Liyuan, Central. By 1910, the "Boy" pattern was adopted as a registered trademark of Baoxin's products. Its business continued to cover Southeast Asia, and it also had distribution stores or production plants in Guangzhou, Vietnam and Macau. After the 1950s, it expanded further to Taiwan, Australia, North America, Europe and other regions, and sold in every corner of the world.

Baoxinan Oil and Baoxinan Paste are made of more than ten precious Chinese medicines and are refined continuously for 36 hours. The medicine is gentle, with wide effect and low irritation. It can relieve wind and cold stomach pain, dizziness, headache, cough, mosquito bite itch , muscle sprains, joint pain, and reducing swelling and dispersing blood stasis are significant.

The outer packaging iron can has Chinese color patterns and the "boy" trademark. The classic packaging is paired with devout Chinese medicine, which implements excellent Chinese traditions from the inside to the outside. The "Boy" pattern is officially registered as a product trademark, becoming a well-known brand.