Always thinking for others, Chang never stays at a subject's home through lunchtime for fear of disturbing their mid-day routine. For the same reason, he also makes it a rule not to drop in on people before two o'clock in the afternoon.
他處處為人設想周到，為了怕給人添麻煩，從不留在訪視對象家中吃飯；怕打擾人午休，下午兩點前也不做訪視。