On August 20, the State Administration for Market Regulation and the National Standardization Administration of China approved the announcement of 450 recommended national standards and 4 national standard amendments. These include technical specifications for household composting plastics and standards for seawater degradation testing methods:
| Standard number | Standard name | DATE |
| GB/T 40553-2021 | Plastic Technical specifications for plastics suitable for home composting | 2022-03-01 |
| GB/T 40367-2021 | Plastics. Determination of the ultimate aerobic biodegradability of non-floating materials exposed to marine sediments. Method by analyzing the released carbon dioxide | 2021-10-01 |
| GB/T 40611-2021 | Plastics. Determination of the ultimate aerobic biodegradability of non-floating plastic materials at the interface of seawater sandy sediments. A method for measuring oxygen consumption in a closed respirometer | 2022-03-01 |
| GB/T 40612-2021 | Plastics. Determination of the final aerobic biodegradability of non-floating plastic materials at the interface of seawater sandy sediments. Method by measuring the release of carbon dioxide | 2021-10-01 |
