(This video tutorial combines theory and practice. Starting with the basic use of Flink CDC, this paper explains the use of datastream and flinksql, and explains in detail how to customize the deserializer. More users surveyed Flink's latest Flink CDC 2.0. Based on 1 X's technical pain point, 2.0 provides a more optimized solution. This tutorial combines the source code to deeply analyze its core principles.)