Clinical Study of Cord Blood Mononuclear Cells on Treatment of Hormone-resistant or Hormone-dependent Ulcerative Colitis

Inclusion Criteria: * 1\. Western medicine diagnosis is consistent with patients with refractory ulcerative colitis. * 2\. 18 Years to 65 Years，male or female. * 3\. Those who voluntarily participate in this clinical study and have signed an informed consent. Exclusion Criteria: * 1\. Patients with non-refractory UC. * 2\. Those who are pregnant or breastfeeding, or have a childbirth plan in the near future. * 3\. People with severe allergies or allergies to known ingredients in basic treatments. * 4\. Patients with severe primary diseases such as severe cardiovascular and cerebrovascular diseases, liver and kidney, and hematopoietic system. * 5\. There are serious complications, such as local stenosis, intestinal obstruction, intestinal perforation, multiple intestinal polyps, toxic megacolon, rectal cancer, etc.. * 6\. Patients with mental disorders and intellectual disabilities. * 7\. Patients who have participated in clinical studies of other drugs in the past 3 months. * 8\. Those who are seriously ill and need emergency treatment. * 9\. Patients who are still undergoing other treatment options for ulcerative colitis. * 10\. Researchers believe that it is not suitable for entry.