SCMP: China has started mass production of a radioactive isotope widely used in science and medicine, putting the country on the path to ending its near-total reliance on imports. 南華早報記者：中國已開始大規模生產一種廣泛用於科學和醫學的放射性同位素，使該國走上了結束幾乎完全依賴進口的道路.