Excellent：He specializes in gastrointestinal motility, digestive endoscopy examinations, and treatments, as well as diagnosing and treating disorders of the digestive system, including gastroesophageal reflux.

Excellent：Specializing in detailed gastrointestinal endoscopy examinations, early gastrointestinal tumor endoscopic diagnosis and treatment, endoscopic ultrasound examinations, and diagnosis and treatment of complex digestive diseases.

Excellent：She specializes in diagnosing and treating diseases of the digestive system, including gastroesophageal reflux disease, inflammatory bowel disease, early-stage digestive system cancers, dyspepsia, and liver and gallbladder disorders. She is skilled in digestive endoscopy, performing both diagnostic and therapeutic procedures such as polypectomy across various digestive organs (esophagus, stomach, intestines, liver, gallbladder, pancreas). Her expertise extends to the diagnosis and minimally invasive treatment through digestive endoscopy techniques like gastroscopy and colonoscopy.

Excellent：He is proficient in various minimally invasive endoscopic techniques, including gastroscopy, colonoscopy, endoscopic ultrasound (EUS), and small bowel endoscopy. Dr. Niu is skilled in procedures such as endoscopic variceal ligation (EVL), endoscopic submucosal dissection (ESD) for early gastrointestinal cancers, peroral endoscopic myotomy (POEM) for achalasia, and endoscopic retrograde cholangiopancreatography (ERCP).

Excellent：His work primarily involves endoscopic minimally invasive diagnosis and treatment of digestive system ailments, including procedures like endoscopic resection of gastrointestinal polyps, early gastrointestinal cancer, ERCP for bile duct stones, treatment of biliary and pancreatic tumor-induced obstructive jaundice, and stent placement for malignant digestive tract tumors.

Excellent：He is proficient in diagnosing and performing endoscopic treatments for a variety of digestive diseases using different endoscopes (gastroscopes, duodenoscopes, colonoscopes). His expertise particularly extends to the diagnosis and treatment of gastrointestinal diseases (esophagus, stomach, intestines, liver, gallbladder, pancreas), encompassing conditions such as peptic ulcers, gastroesophageal reflux disease, and inflammatory bowel disease. He is also skilled in endoscopic minimally invasive procedures for gastrointestinal polyps and early-stage cancers, as well as minimally invasive treatments for pancreatic and biliary duct diseases, POEM, and the placement of esophageal, pancreatic, and biliary stents.