Please refer to the recertification rules:
Huawei certification consists of three technical domain: ICT infrastructure certification, platform and service certification, and ICT vertical certification.
Examinees can update the validity date of the certificate in any of the following cases before the certificate expires:
● Participate and pass any exam of the current certification.
● Participate and pass any exam of the higher level certification which from the same technical direction of the current certification.
● Participate and pass any exam of the same or higher level certification which from the same technical domain of the current certification.
https://support.huawei.com/learning/Certificate!toRecertification?lang=en