Choi Chi-yin has worked on construction sites in Hong Kong for more than four decades. While the 65-year-old could comfortably retire, he feels compelled to keep plying his trade as a fire safety specialist.
蔡志贤（音译）已经在香港建筑工地上工作了40多年。尽管这位65岁的老人可以很安逸地退休，但他觉得有必要继续从事自己作为消防安全专家的工作。
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