1, obstructive jaundice biliary drainage (PTCD) + intra-biliary stent placement technique Obstructive jaundice can occur when a tumor invades or compresses the bile duct and causes its stenosis. PTCD is a percutaneous intrahepatic bile duct dilatation and intra-biliary stent placement to create effective biliary drainage to subside jaundice and restore liver function. 2.Gastrointestinal stenosis and obstruction Endogastric stenting technique Treatment of esophageal stenosis and fistula caused by various benign and malignant diseases. 3.Hemorrhagic disease Hemorrhagic artery interventional embolization technique Through a minimally invasive interventional method, embolic substances are selectively injected into the tumor bleeding vascular artery through a catheter to achieve hemostasis. Clinical scope: Hemoptysis, hematemesis, blood in stool, traumatic hemorrhage, emergency interventional embolization to stop bleeding.