After the import -> wordpress, the demo file was installed but how come i cannot import the demo file at all 

The issue has been elevated.

The demo files are still not displayed nor are some of my portfolio pages.

This is one of the examples. 

http://www.xingfan.org/portfolio/virtual-house-web...

Another problem i have is that single image in visual composer is not working either. 

I find that all of the animations with salient template are not working at all. The affected components include sliders, single image, which has CSS fade in animations, and demo files, which use a lot of single images and sliders.

Please advise! Thank you for your help!