Jiangda's extraction method is mainly fluidized extraction of carbon dioxide, which changes the form of substances through pressure, so there will be no chemical reaction and other substances have been mixed, so it will be golden yellow; Therefore, unlike the second-generation propolis, which is mainly black, black propolis is mainly extracted with alcohol, which will produce a chemical reaction to form a black compound that cannot be separated from propolis. There will be harmful substances such as alcohol and lead in propolis, which will have a great impact on the overall activity of propolis.