The single-chip fully integrated droplet digital PCR independently developed by CAS-Envision is an automated and integrated digital PCR prototype that integrates upgraded droplet generation, PCR amplification and fluorescence detection. The prototype has been verified by third-party tests that the system can quickly generate and tile more than 20,000 droplet arrays. The droplet size CV value is only 1.1%, and the detection repeatability CV value is only 0.1%. It is effective for samples such as lung cancer gene Eml4-ALK. The linearity of the test result is as high as 99.95%.