After the job transfer card expires, it can only be put in a permanent fresh-keeping bag. There may be fresh-keeping bags with a price lower than 600D in the trading place. Just go to the trading place and search for "permanent".

It is recommended that melon rinds, oil lamps, and water pipes be renewed permanently before changing jobs. Third-line, hot dogs, and boiled eggs also cost 600D to renew. The price is the same as fresh-keeping bags. You can choose to renew before changing jobs, or Bag after job change.