Peking University People's Hospital is conducting a randomized control, multicenter, open-label study to look at the clinical benefit of using a combination of Iguratimod and Danazol together vs Danazol alone for the treatment of primary ITP in adults between the ages of 18-70 years. Iguratimod is a non-steroid anti-inflammatory disease-modifying anti-rheumatic drug (DMARD), a newer therapy used to treat patients with Rheumatoid Arthritis. It works by acting on T- and B-cells in the immune system and can inhibit the expression of various inflammatory factors in the body. The study is looking to recruit 100 adult participants who are steroid-resistant or steroid-dependant, i.e., patients who do not have a significant platelet increase in response to steroid treatment, or patients who are unable to wean off steroids without risking a decrease in their platelet count. Participants must have a platelet count less than 30,000/μL. Participants will be excluded it they have congestive heart failure, an arrhythmia, are pregnant or nursing, or have HIV, cancer, lupus, H.pylori, certain metabolic conditions, Hepatitis C (HCV) or other infections causing thrombocytopenia.