The presenter has acquired the Doctor's Degree in Oncology from Shanghai Jiao Tong University in july 2017. The presenter has been focusing on unrevealing the mechanisms ofhow dying tumor cells promote tumor repopulation after radiotherapy from the perspective of neovascularization. Similarly, not only in colorectal cancer, we have also discovered important role of caspase 3 in post-irradiation angiogenesis in glioma cells. Therefore, we may hypothesized that it might be a biologically conservative signaling pathway in the process of tumor recurrence after radiotherapy. We hope this interesting phenomenon could be known by more researchers.