• Aged 60 or older, regardless of gender;

• Patients with moderate-severe or worse tricuspid regurgitation (TR≥3+);

• The multidisciplinary cardiac team (composed of experts in cardiovascular internal medicine and surgery, imaging, anesthesiology, etc. \[No. of experts in cardiovascular surgery \>=2\]) considers the subjects to be at high risk for surgical operation (STS score \> 6.0%) and expects that they will benefit from the transcatheter tricuspid annulus repair;

• Patient with normal left ventricular function (LVEF≥40%);

• The subject voluntarily participates in the clinical trial and he/she (or his/her guardian) agrees to sign the informed consent form.