Funding for this research was provided by:
Zhejiang Province Public Welfare Technology Application Research Project (LGG19F010011)
Natural Science Foundation of Zhejiang Province (LQ18F030006)
Project Intelligentization and Digitization for Airline Revolution (2018R02008)
Received: 7 November 2020
Accepted: 22 June 2021
First Online: 6 July 2021
: This article does not contain any studies with human participants or animals performed by any of the authors.
: All authors agree to submit this version and claim that no part of this manuscript has been published or submitted elsewhere.
: The authors declare that they have no competing interests.