Yang Mingyuan held up a slightly rough glass petri dish that was still hundreds of years ahead of the manufacturing process of this era, and cautiously called out a sentence. System, apply for acceptance. [Ding! Composition analysis, please wait!] [The properties of the current petri dish are as follows: hyaluronic acid (microbial fermentation method), with a purity of 0.1%, which has reached the human body absorption standard!] [Congratulations on completing the system test task: making hyaluronic acid!] [You have successfully started the continuous task of the life department: Aimei The first step!] [Please use hyaluronic acid to make a mask, and sell it successfully, the profit will not be less than one thousand gold!] [You have obtained the auxiliary book 'The Process of Mask'] A series of prompts sounded in Yang Mingyuan's mind, It made him happy and sad, and he embarked on the road of setting up a street stall to create the most powerful Tang Dynasty.