For other XDJMs who may have the same problems, my operation is as follows:
1. Download Winrar (it is a free shared software)
2. Download Realone from the link offered by Zero bro or lewis bro, please note that it is also a shared software that you may only download free from domestic chinese website.
3. Download the audio rm file from the link provideed by Zero bro, it will autometicly save in your winrar filefolder
4. Extract the download audio file to desktop or other location you know in your hard drive. (this is the step I missed)
5. double click the extracted file and enjoy our manderater's excellent work!
It is crystal clear! Thanks for all you guys' wonderful works