Watch HDToday. How small and powerless the Doudou family is in the face of disease. The doctor explained to Doudou’s parents that Tzu Chi is the largest bone marrow stem cell center in the country and can do bone marrow matching between non-relatives. Once the pairing is successful, the chance of healing is high. Through the efforts of the Tzu Chi bone marrow care team, a miracle finally appeared. Doudou Dou finally regained his health and started a new life.