Dr. Chi is a doctor whom Shi Guilin visits secretly for his own medical check-up after Nian Nian's examination. Shi Guilin refers to him with 'Long time no see,' indicating a prior relationship. The encounter suggests Shi Guilin's concern about his health condition and his desire to avoid Nian Nian seeing him in a vulnerable state. Dr. Chi is mentioned only at the end of Chapter 18, with no further details provided.
