TST (Tissue-selecting Therapystapler) minimally invasive surgery, also known as selective hemorrhoidal mucosal anastomosis, invented by Prof. Wang Yehuang (Patent No.: 200620073077.2), is known as the safest minimally invasive technology so far by the anal and intestinal diagnostic and treatment circles, and it is a new type of technology that has been developed on the basis of the PPH surgery recently.TST utilizes special anoscope to form different open-ring windows, and uses the anastomosis probe to lock the hemorrhoidal nucleus to adjust the excision range for the size and amount of the hemorrhoidal nucleus to maximize the effectiveness of TST. Minimally invasive surgery makes use of special anoscope to form different open-ring windows, using an anastomotic probe, locking the hemorrhoidal nucleus, adjusting the excision range of hemorrhoidal mucosa according to the size and amount of hemorrhoidal nucleus, and maximizing the protection of the normal function of the anus. Technical advantages Precise positioning: using the special anoscope, it can precisely locate the prolapsed mucosa, successfully and safely selectively excise the mucosa on the hemorrhoids in the prolapsed area, which is in line with the theory of liner downward displacement and reduces the surgical trauma. Mild pain: traditional surgery is performed in the anal cushion area controlled by somatic nerves, which is sensitive to cutting and causes severe pain, while TST surgery is performed in the rectal mucosa area controlled by vegetative nerves, which is insensitive to cutting, so the surgical pain is mild. High safety: TST technology treatment will not leave scar, will not destroy the physiological function of the anal cushion, does not destroy the normal structure and appearance of the rectum and anal canal, and also avoids the occurrence of anal stenosis, incontinence and other complications. Compared with traditional treatment methods, the treatment is safer. Shorter recovery time: due to less traumatic treatment, patients recover faster after surgery, and many can be performed as an outpatient procedure, realizing treatment on the go. Most patients can basically recover and start normal work and life in 5-7 days after surgery.