Why can't Hainan Health Code COVID-19 be vaccinated with e-Cert?

Visits surged. Due to the surge of visits to health codes in Hainan, the query volume of vaccination interface is too large, and the functions of displaying health codes in gold and silver and querying vaccination status in Hainan are affected. The "health code" is based on real data and can be generated by citizens or people who have returned to work through their own online declaration and background audit.