From a domain perspective.
Although the Song Dynasty in 1100 had yet to establish a complete scientific nurturing system, let alone the so-called scientific literacy.
But it was in such a relatively ignorant and chaotic historical context.
Old Su still made the most appropriate decision upon observing the cell surface for the first time:
Engraving the image.
No other choice.
After all, in the past few decades.
Whether drawing star maps, compiling the "Herbal Atlas" or writing the "New Astronomical Instrument Manual", illustrations were an indispensable core part.
To use a later JOJO meme... it's drawing.
This has become a natural instinct engraved in Old Su's DNA.
A quarter of an hour later.
The Old Chief Steward returned to the courtyard with a small box and handed it over to Old Su:
"Master, the paper and pen are here."
Old Su nodded and took the paper and pen.
While instructing the Old Chief Steward to grind ink, he spread the paper on the stone table.
