Basically the chapter can be summarised about the sister asking Nie Li about his world and some conversation about her master.
The childe prepares a medicine based on Nie Li's prescription. Sister consumes it and feels there are minor improvements. Nie Li reminds them to consume it regularly and that he will change the prescription after a month.
The Childe rewards Nie Li with 1,500 spirit stones. Nie Li rejects us and takes only 500. He will take the other 500 when the sister is fully cured.