天勤api,数据，datetime是纳秒对吗？k bar是开始时间对吗？

klines = api.get_kline_serial(“CFFEX.IC2609”, 60*5)
print(klines)

klines.iloc[0]
Out[2]:
datetime 1788231000000000000.0
id 7216.0
open 7784.8
high 7794.6
low 7781.2
close 7783.2
volume 1133.0
open_oi 142322.0
close_oi 142293.0
symbol CFFEX.IC2609
duration 300
Name: 0, dtype: object