Which episode of insomnia is Ni talking about?

Episode 14 The Emperor's Internal Classic, the root of insomnia. Ni, an American Chinese medicine practitioner, was born in the Special Administrative Region of Taiwan Province Province, China, and in Ruian, Zhejiang, with dual nationality. He founded the Hantang Classic Chinese Medicine Clinic in the United States, and served as the doctoral supervisor of California University of Traditional Chinese Medicine and the dean of Hantang Chinese Medicine College in the United States. In addition to Chinese medicine, he is also good at numerology, divination, feng shui and so on. He once taught astronomy and geography under the pseudonym Fan Yulong. He devoted his life to the development of Chinese medicine and China culture, claiming to be a modern descendant of the Classic Prescription School. However, because of his strong criticism of febrile diseases and western medicine, it also caused some controversy.