This research studies factors affecting Chinese patient participation in cancer clinical trials and their knowledge regarding clinical trials. The investigators design this study to determining how patients makes decisions about participating in a clinical trial and know about patients' attitude toward clinical trials. The investigators aim to find ways to make cancer clinical trials in China more efficient and satisfied patients participating in clinical trials in China.

Inclusion Criteria:

• Clinical diagnosis of malignancy
• Aged 18 years or older
• Ability to understand and complete the questionnaire independently or with the help of a relative or staff member of the oncology department
• Patients have been consented to join an oncology treatment clinical study and have begun active treatment of an oncology clinical trial

Exclusion Criteria:

• Not meeting all eligibility criteria

Chinese patients with a diagnosis of cancer who have joined cancer clinical trial.