The Chinese authorisation bodies are:
1 AQSIQ: General Administration of Quality Supervision, Inspection and Quarantine (国家质量监督检验检疫总局) where the actual certificates will be issued by provincial Entry-Exit Inspection and Quarantine Bureaus, which are administered by AQSIQ; and
2 the China Council for the Promotion of International Trade.
Details are now also in the FAQ section of DIBP ChAFTA information.