The CNIPA will only accept the documents submitted by personal delivery before 4:00 pm. After 4:00 pm, the documents can only be submitted by mail. However, for non-use cancellation for which no official deadline is set, the date of receipt of the mail (instead of the date of sending out) will be regarded as the filing date. That’s why we once required to have the POA reached us before 2:00 pm, otherwise we cannot catch up the time for personal delivery.