Shanghai Archives, many people may not know that this place can also be visited for free, but only one hour every Tuesday, 4 or 6 afternoons. Book in advance on the "Huangpu most Shanghai" WeChat public account. Very good is that there is a professional free explanation at 2 pm, which is much more than seeing the harvest. The archives have 1, 2, 3, 4 and 6 floors open, and the other floors are office. The explanation is mainly on the first and second floors, and the others can be seen slowly.