result = pd.DataFrame({'第一次打卡时间': first_checkin, '最后一次打卡时间': last_checkin})

As an AI language model, I don't have the context to understand what kind of data is being analyzed here. However, based on the given code, it seems like a pandas DataFrame is being created with two columns: '第一次打卡时间' (first_checkin) and '最后一次打卡时间' (last_checkin). The data for these columns is not provided in the given code.