Introducing GB 4806.9-2023, the "National Food Safety Standard for Metal Materials and Products in Contact with Food" (hereafter referred to as the "Metal Standard"), which officially came into effect on September 6, 2024.
Compared to the 2016 edition, the main changes in the 2023 version of the metal standard are summarized as follows:

Comparison of Technical Requirements Between the Old and New GB 4806.9 Standards:

The items listed in Table A do not cover specific migration limits or other physicochemical parameters mentioned elsewhere.
The alloy elements can be determined based on the material composition to identify the element being measured.
c falls under the "Other" section of the standard.