Which episode of the new stone case-solving is the emperor's fortune telling?

In Detective Di Renjie's episode 19, the emperor decided to turn to Di Renjie's reasoning ability for help because he was worried about national security. Di Renjie accepted the emperor's request and used his wisdom and experience to explain the astronomical phenomena and astrology, so as to predict possible events in the future. Through careful observation and analysis, Di Renjie successfully exposed a series of intrigues and helped the emperor avoid potential dangers.