The Regulations Governing Labor by Prisoners Article 19

The prison may assign the prisoner to cell work if, under special circumstances, the prisoner is unable to participate in work at workshops.The prison shall arrange suitable work items for the prisoner according to the conditions of the prisoner participating in the cell work.
中文原文 受刑人作業實施辦法第19條
受刑人因特殊情形無法參加工場作業,監獄得分派其參加舍房作業。
監獄應依參加舍房作業受刑人之條件,安排合適之作業項目。

English translation for reference only; the Chinese text prevails. Not legal advice.