Funding for this research was provided by:
Shenzhen strategic emerging industries and future industries (KJYY20180201180253571)
Shenzhen science and technology innovation shenzhen-hongkong joint research project (SGLH20180622152010394)
Shenzhen overseas high-level talents innovation and entrepreneurship special fund project (KQJSCX20180328093806045)
Text and Data Mining valid from 2020-01-16
Received: 10 September 2019
Revised: 22 December 2019
Accepted: 26 December 2019
First Online: 16 January 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Not applicable.