This article explains four cases of professor REN Ji-xue,including anasarca,serious blepharoptosis,head cold,summer diarrhea,from which we can find the laws of syndrome differentiation by him. In which,the key point of the pathogenesis of anasarca is spleen-qi deficiency, so replenishing qi and invigorating the spleen, warming yang for diuresis are the treatment nethod for anasarca. Sinking of qi due to deficiency of spleen leads to serious blepharoptosis and Invigorating Spleen and Replenishing Qi Decoction is the main prescription. The key pathogenesis of head cold is disharmony of nutrient qi with defensive qi, so regulating ying and wei, dispersing lung qi for resuscitation are the treatment methods, and both inside and outside therapies are in use. Cold-damp invasion of spleen is the main cause of summer diarrhea, so activating qi flowing and warming spleen and stomach, dissipating dampness for stopping diarrhea are used. Professor REN Ji-xue is good at taking different method according to different key point of the pathogenesis, so the efficiency is good. This is one feature of Professor REN in treating miscellaneous diseases.

During coronavirus disease 2019 epidemic, the treatment of severe trauma has been impacted. The Consensus on emergency surgery and infection prevention and control for severe trauma patients with 2019 novel corona virus pneumonia was published online on February 12, 2020, providing a strong guidance for the emergency treatment of severe trauma and the self-protection of medical staffs in the early stage of the epidemic. With the Joint Prevention and Control Mechanism of the State Council renaming "novel coronavirus pneumonia" to "novel coronavirus infection" and the infection being managed with measures against class B infectious diseases since January 8, 2023, the consensus published in 2020 is no longer applicable to the emergency treatment of severe trauma in the new stage of epidemic prevention and control. In this context, led by the Chinese Traumatology Association, Chinese Trauma Surgeon Association, Trauma Medicine Branch of Chinese International Exchange and Promotive Association for Medical and Health Care, and Editorial Board of Chinese Journal of Traumatology, the Chinese expert consensus on emergency surgery for severe trauma and infection prevention during coronavirus disease 2019 epidemic ( version 2023) is formulated to ensure the effectiveness and safety in the treatment of severe trauma in the new stage. Based on the policy of the Joint Prevention and Control Mechanism of the State Council and by using evidence-based medical evidence as well as Delphi expert consultation and voting, 16 recommendations are put forward from the four aspects of the related definitions, infection prevention, preoperative assessment and preparation, emergency operation and postoperative management, hoping to provide a reference for severe trauma care in the new stage of the epidemic prevention and control.