Chinese Silk brand validation...

i bought a duvet and pillow cover set sold as silk at a shopping mall (pearl city) today, the girl who sold it swore it as silk and the box had the name called SHINING Classic Collection, the material is quite heavy and is colorful, i wonder if this is real Chinese Silk. I tried to search for this SHINING Brand on the website and nothing seems to come. Could you please help me know how can i verify if that indeed is silk as i paid over 1200 RMB for it. The original marked price was 2400. Thanks