Function: ★ The symbol indicates functions that need to be used with optional accessories. 1.Head and neck: 1) Vital sign simulation: pupil observation, the pupil liquid crystal display is CSTN pseudo-color, 65k color, RGB, which can be adjusted to normal, dilated, reduced and other states between 1-9mm. The carotid artery can vividly reproduce the patient's moaning, coughing and vomiting. sound. 2) Breathing mode: simulate normal breathing, sigh-like breathing, Chen-Shi breath, Kushmore breathing, Biot breathing. 3) Airway management technology: standard oral and nasal intubation, tracheotomy, head-up and chin-lift method, and mandibular push-up method are supported to open the airway. Alarm for tooth pressure. ★ Multimedia animations simultaneously display the intubation position, and auscultation is used to detect the intubation position and simulate trismus, tongue swelling, pharyngeal edema, laryngospasm, and unilateral and bilateral pulmonary obstruction. Signs such as main airway obstruction.