More of a problem for him is that the quality of Taipower coal is not uniform, and that furnace slag from China Steel is produced through different methods, some by air-cooling and some by water-cooling.
更麻煩的是台電的煤源不一，中鋼爐石又因生產的方式不同，而有氣冷爐石及水淬爐石兩類。