The Marrow Cleansing Concoction was made by Ye Caoyun on the spot before his parents and the doctor in the mansion. They all watched the process and it was done the whole time. From processing the herbs properly, the steps of which herb should be placed first, which was next and finally how to mix these herbs evenly and properly. Even an ordinary person can actually do it which amazed the duke, duchess and the doctors in the mansion. This is especially true when they watch the mixed herbs glow into a certain shade which signifies that the concoction was made correctly.
Ye Caoyun had actually made enough for the whole family and everyone in the mansion including the guards and servants in the mansion. There were actually some extras as well. Since this is the second time he is making it, it was a lot faster than the first time. After the concoction was made, it was sealed in a potion bottle.
