[Fix]Close #643
[Fix]Close #643

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