Once there's a patient, wanting to receive medical treatment requires money, and with their current status, it's extremely difficult to find money, so they'll take the money and also hand over the invitation.
"Are you that certain?" The man looked at Chu Molin, questioning why he was so sure he would listen to Er Ha.
"It's not certainty, it's a definite, because you have a patient at home, her life is more important than these two pieces of paper. You can have another chance to get this later, but if the patient loses her life, you'll regret it for the rest of your lives. So, you'll make the exchange." This thing, once gone, can be sought again, but once a life is lost, nothing else remains, and these two are smart people, they know what to do.
"If it weren't for Er Ha, how would you know what we urgently need?" The man knew Chu Molin was right.
They just didn't have money, hence couldn't take Grandma for treatment, but it didn't mean they could watch Grandma die from illness.
