What foods can I bring into China?

I will be traveling to China Saturday the 10th of November 2018. I eat a vegan diet and would like to bring pre-cooked and pre-packed beans and rice, a powdered protein and greens mixture, and chia seed/flax seed ground into meal. Given food safety concerns, I thought I should ask if such foods are allowed? Do you have a list of food items I should not take with me?

Thank you