@ERIC
Thank you for your reply. I have downloaded, installed and started using “softmaker freeoffice”- SoftMaker 2018.
But I am disappointed that it is not a free software, but a free version. The company is still selling its paid version.
I simply tested TextMaker (MS Word) and found that its interface and operation method are too different from MS. Especially image processing and table processing I can’t adapt at all. I can’t even put a picture into a cell of the table, and can’t set the percentage of the table occupied. Due to the short time, maybe I have missed something.
Later, I found out that Sanwhole also offers a free version. Before the software is activated, it is a free version with many functions. Moreover, their Agreement says “All Sanwhole software can be fully tested before purchase. You can download and install the free software for complete functional test. Free version of the software has all the functions, but in use will pop up countdown window. After the countdown, the corresponding function will be automatically effective.”