If the deceased has just passed away, it is usually necessary to light incense for meals after May 7 to express the memory and respect for the deceased. However, if the deceased has been dead for a period of time, whether to order incense for dinner after May 7 can be decided according to personal wishes and family habits.
In a word, whether to light incense and send meals about five or seven days before the dead can be decided according to the specific situation, and there are no fixed rules and requirements.