To sum up, do in Rome as Rome does, but you need not worry about these cultural barriers since most Chinese are hospitable and amiable and will not mind your nonproficiency.
总之，入乡随俗，但你也不必对这些文化障碍担心，因为大多数中国人都是好客和和蔼的，他们不会介意你的不熟悉。
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