Funding for this research was provided by:
the Natural Fund Guidance Program of Liaoning Provincial of China (2019-ZD-0814)
the Key Research and Development Guidance Program of Liaoning Province of China (2018225028)
the College students' innovation and entrepreneurship training program of Liaoning Provincial of China (201910160080)
Article History
Received: 12 April 2020
Accepted: 4 December 2020
First Online: 6 January 2021
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: Not applicable.
: Not applicable.
: The present manuscript was approved by all authors for publication. All work described herein is original research and has not been published previously or is under consideration for publication elsewhere, in whole or in part.