It's only an hour for a friend to watch your flight. Usually it's just a drink for you, and it's not time for dinner, so there is no possibility of eating.

If you really encounter the problem of eating on the plane in the future, you can wait until the flight attendants deliver the food to you and tell them that you are eating halal food. They will be happy to serve you. Every flight in China has prepared halal meals for Muslim friends, so don't worry about this problem.