In order to avoid having to bring the production line to a close because of the unavailability of chlorofluorocarbons, the search for a substitute refrigerant has been pushed up, and is being tried out on the production line. This has already become a major activity for all domestic auto manufacturers.
為了避免將來買不到冷媒而使生產線「開天窗」，因此提早尋求替代冷媒，並且在生產線上試用、測試，已成為所有國內車廠刻不容緩的大事。