When you return to China from abroad, don't bring meat products (vacuum-packed ham and jerky count too), cheese, fresh fruit or seeds; if you carry animal or plant products, use the red channel (红色通道) to declare them

In plain words

When you return to China, no meat can be brought in, cooked or raw; ham, jerky and sausage are the same however tightly packed. Cheese, butter, fresh eggs, fresh fruits and vegetables and seeds are also on the banned list. If you bring them, they will be sent back or destroyed. If you carry animal or plant products and don't declare them, you may also be fined, up to 5000 yuan.