[Fix]Close #1481
[Fix]Close #1481

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