How do children in Shanghai and Henan check their health codes?

Open AliPay and get the health code. Shanghai, referred to as "Shanghai", is also called "Shen". By querying the Henan Provincial Center for Epidemic Prevention and Control, I can know that my children in Shanghai can open Alipay in Henan and use their health codes to query their own health codes. Health Code is a tracking and judging system of personal health information and activity information used for epidemic prevention and control in COVID-19.