Open access journal

This journal is a peer reviewed, fully open access journal owned by KeAi Communications Co., Ltd. (KeAi). KeAi retains copyright of the overall compiled journal and the compiled issues. Every peer-reviewed research article appearing in this journal will be published open access. This means that the article is universally and freely accessible via the internet in perpetuity, in an easily readable format immediately after publication.

To provide open access, this journal has an open access fee (also known as an article publishing charge APC) which needs to be paid by the authors or on their behalf e.g. by their research funder or institution. The Article Processing Charge (APC) for all papers submitted before the 31st of December 2023 is USD 550, excluding taxes. The fee is applicable upon acceptance of the article.

Peer review under responsibility of KeAi Communications Co., Ltd.

Access Rights
All articles published open access will be immediately and permanently free for everyone to read, download, copy and distribute.

User Rights
Permitted third party reuse is defined by the following user license:

Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND):
For non-commercial purposes, lets others distribute and copy the article, and to include in a collective work (such as an anthology), as long as they credit the author(s) and provided they do not alter or modify the article.The full details of the license are available at

Author Rights
For open access publishing this journal uses an exclusive licensing agreement. Authors will retain copyright alongside scholarly usage rights and KeAi Communications Co., Ltd. will be granted publishing and distribution rights.

Publishing Schedule
This journal is issued once yearly, every single article is published online timely.

Contact Details
Ms. Oz Pan
Phone: +86-01-6401 0225
Address: R413, Building 5, 16 Donghuangchenggen North Street, Beijing, China

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