docs: def from_utctimestamp(self, timestamp):
          """Create a **UTC datetime** object that number of seconds after
          UTC 1970-01-01 00:00:00. If you want local time, use
          :meth:`Rolex.from_timestamp`
  
          Because python doesn't support negative timestamp to datetime
          so we have to implement my own method.
  
          **中文文档**
  
          返回一个在UTC 1970-01-01 00:00:00 之后 #timestamp 秒后的时间。默认为
          UTC时间。即返回的datetime不带tzinfo
          """
          if timestamp >= 0:
              return datetime.utcfromtimestamp(timestamp)
          else:
              return datetime(1970, 1, 1) + timedelta(seconds=timestamp)