We need to analyze from two situations and two classes. The two situations are a good harvest and a bad harvest. The two classes are slave owners and slaves. First of all, it is certain that slave owners can eat food crops even in good harvests and poor harvests. Secondly, before the Han Dynasty at that time,

When the Hetao Plain was not collected, the animal husbandry in the Central Plains was extremely backward, so there was no problem of meat. They could eat wild goose meat.

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Moreover, according to the records of Emperor Zhou, people at that time had various kinds of sauces and even had ant egg sauce (yuck). And the four major delicacies at that time were: elephant trunk/orangutan lip/hump/I can’t remember. To sum up, the sauces at that time were

Slave owners (nobles) lived a life based on vegetarian food (millet + rice +... (coarse grains)). Secondly, their meat diet was definitely very rich, but it was definitely not pork-based as it is now. At that time, it was still mainly pork.

Mainly dog ??meat (I don’t believe it) and then slaves. The food of slaves is various, but it is definitely not what you can swallow now. For example, bean cakes for horses (donkeys +...), and they can only get some during the harvest.

Rice +... [The reason why there are so many snacks in China is that the working people in ancient times had to use substitutes in order to eat them]. But when the harvest was bad, they could eat bark grass roots.

If you want to understand the ancient food culture, you can read "Live."