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Authors
Xu, Zhiqiang
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Article History
Received: 19 June 2025
Accepted: 18 September 2025
First Online: 15 March 2026
Ethics
: Conflict of Interest Zhiqiang Xu is an editorial board member/managing editors/editor-in-chief for Acta Mathematica Sinica, English Series and was not involved in the editorial review or the decision to publish this article. All authors declare that there are no competing interests.
