Submissions are closed for this phase

Why all submissions are closed untill now? Can someone clear my doubts?

Dear @lugang1208,

We sincerely appreciate your interest in our challenge. We would like to inform you that the submission for the first phase is now open. You can submit your validation set results in the JSON format as described in the page. We are also delighted to announce that we will be launching subsequent phases in the coming days for algorithm docker image submissions.

Thank you once again for your participation, and we look forward to your continued engagement.

Best regards, Sezgin