Visa expiry. Hello, I asked the Entry-Exit Bureau of Beijing, China

and they said the duration starts to be counted from the day of arrival, not from the next day. In this case, I will be overstaying in China for a day. Secondly, do you think it is possible for them let me go in this kind of situation? And some people even say they can make you come back to the city and apply for a visa extension in which case you are made to stay here 2 more weeks? Is it true?