Before the surgery, Ran Yan checked the large box that Liu Qingsong generally kept close by.
"Ran Yan, this is catgut, I made it myself," Liu Qingsong carefully took out a metal long box from a wooden ice bucket, and from it, he pulled out an item wrapped in a silk handkerchief. There were only two strands of catgut, as thin as hair but very stiff, like dry branches, yet Ran Yan knew it was an excellent material, one that could be absorbed by the human body, suitable for suturing blood vessels and other areas where removing stitches was problematic, needing to be preserved at low temperatures for long periods, or else it would easily spoil.
In the box, there were also various wound medicines and antiseptic solutions that Liu Qingsong had concocted himself, and almost a complete set of surgical knives. There was even a magnifying glass!
