[Fix]Close #761
[Fix]Close #761

bigdig/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,bigdig/vnpy,vnpy/vnpy,msincenselee/vnpy,msincenselee/vnpy,bigdig/vnpy,andrewchenshx/vnpy,andrewchenshx/vnpy,andrewchenshx/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,msincenselee/vnpy,andrewchenshx/vnpy,bigdig/vnpy,vnpy/vnpy,msincenselee/vnpy