The servants looked on in confusion as Lin Wanwan busied herself, while little Qingyu followed along excitedly, playing together. They crushed charcoal and carefully poured the solution into a glass pot, asking endless questions.
"Mother, what is activated carbon?"
"Mother, is our water delicious because we put activated carbon in it?"
"Mother, how long do we have to wait until it's ready?"
Lin Wanwan answered all her questions one by one, but little Qingyu was just like the courtyard full of servants, probably hearing without understanding.
Yun Shang reminded Lin Wanwan several times while she was explaining to little Qingyu, hoping her lady would protect the secret formula, since it was something that could be passed down for generations and not everyone in the courtyard was from the Lin Family.
