    Copyright (C) 2020 Shandong University

    This program is licensed under the GNU General Public License 3.0
    (https://www.gnu.org/licenses/gpl-3.0.html).
    Any derivative work obtained under this license must be licensed
    under the GNU General Public License as published by the Free
    Software Foundation, either Version 3 of the License, or (at your option)
    any later version, if this derivative work is distributed to a third party.

    The copyright for the program is owned by Shandong University.
    For commercial projects that require the ability to distribute
    the code of this program as part of a program that cannot be
    distributed under the GNU General Public License, please contact

            sailist@outlook.com

    to purchase a commercial license.
