[Fix]Fix #543
[Fix]Fix #543

bigdig/vnpy,andrewchenshx/vnpy,vnpy/vnpy,msincenselee/vnpy,wisfern/vnpy,rrrrrr8/vnpy,msincenselee/vnpy,harveywwu/vnpy,andrewchenshx/vnpy,harveywwu/vnpy,wisfern/vnpy,bigdig/vnpy,bigdig/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,msincenselee/vnpy,wisfern/vnpy,harveywwu/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,bigdig/vnpy,rrrrrr8/vnpy,vnpy/vnpy,wisfern/vnpy,harveywwu/vnpy,harveywwu/vnpy,wisfern/vnpy,msincenselee/vnpy,harveywwu/vnpy,wisfern/vnpy,andrewchenshx/vnpy