Industrial production of kanten (the Japanese name for agar, which translates as “cold weather” or “frozen sky”) began in Japan in the mid-19th century by natural freeze drying, a technique that simultaneously dehydrates and purifies the agar. Seaweed is first washed and boiled to extract the agar, after which the solution is filtered and placed in boxes or trays at room temperature to congeal. The jelly is then cut into slabs called namaten, which can be further processed into noodle-like strips by pushing the slabs through a press. These noodles are finally spread out in layers onto reed mats and exposed to the sun and freezing temperatures for several weeks to yield purified agar. Although this traditional way of producing kanten is disappearing, even today’s industrial-scale manufacturing of agar relies on repeated cycles of boiling, freezing, and thawing.
舉例來說，汽車產業一直是中德關係的核心支柱，貢獻德國對中國出口的近三分之一。但近年中國汽車業崛起，根據榮鼎集團數據，2025年德國汽車對華出口暴跌66%至2009年最低，中國電動車品牌如比亞迪、蔚來在歐洲市場份額則從2020年的不足1%躍升至2025年的12%。
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