Both will do,
Futures can be traded at T+0,
Securities are traded at T+ 1, and securities can do a wider range of business.
I hope our answer from Guotai Junan Securities Shanghai Branch will satisfy you!
Respondent: Manager Tu, account manager of Guotai Junan Securities.
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If you still have questions, please feel free to ask questions to official website of Guotai Junan Securities Shanghai Branch or Enterprise Knowledge Platform.