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????????1????????????????????20???????????? ????,???,??????????«??»(GB16171.1-2024),????????????2012??????????????????«????»(GB 161712012),???,??????????,???

??,??,2023?????????4.9?????????????,??70%???????????????????????,??????????????????????????????4??????????????????????????,?,???????????????,?????????????????????????????????????,????????????????,???????

?????,?????????????????????????????????????????????50%?40%?70%?50%???,??,???????????????????????,???????????????????????2027?1??1???????????????????,??,?????????????????????80%????????,?????????????​​​​ ??????????????:?????