As the “world’s factory”, China has 41 industrial categories, 191 medium categories, and 525 subcategories. It is the only country in the …
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当前，全球多国进入疫情防控关键阶段，各国对口罩等相关医用物资的需求急剧增加。鉴于口罩在疫情防控中的特殊地位，能否解决口罩紧缺问题，对有效开展疫情防控具有重要意义。
Nowadays, many countries entered the critical stage of epidemic prevention. The demand for medical supplies increased dramatically. Whether the shorta…