When configuring the push certificate, it becomes untrusted as soon as it is opened, and many solutions have been searched.
Due to Apple's revision of relevant regulations, the push certificate
Open Apple PKI - Apple Download the AppleWWDRCA file, select G4, double-click to install, the certificate has become trusted.
AppleWWDRCA (Apple Worldwide Developer Relations Certification Authority) certificate: It is actually an authorization certificate for iOS certificates (dev and dis certificates), and its public key is used to decrypt the reliability of the certificate. iOS and Mac OS X systems (when installing Xcode) will automatically install the intermediate certificate (Intermediate Certificates) of AppleWWDRCA.cer (Apple Worldwide Developer Relations Certification Authority).