There is much evidence. For...

There is much evidence. For starters:

http://kingworldnews.com/kingworldnews/KWN_DailyWeb/Entries/2013/6/11_Stunning_Gold_%26_Silver_Charts_Reveal_Shocking_Global_Demand.html
http://investmentwatchblog.com/chinese-silver-demand-surges-incredible-four-fold-in-just-one-year/
http://moneymorning.com/2013/03/28/these-three-charts-point-to-higher-silver-prices-ahead/
http://kingworldnews.com/kingworldnews/KWN_DailyWeb/Entries/2012/12/17_John_Embry_-_Chinese_Demand_For_Silver_Has_Exploded.html
http://www.libertygoldandsilver.com/GoldandSilverBlog/?p=140
http://www.gainesvillecoins.com/news/436/silver-eagle-sales-in-september-soar-to-4.46-million-coins-sold.aspx
http://goldsilverworlds.com/gold-silver-general/global-physical-gold-silver-demand-on-fire-amid-price-dro/
http://www.mintcollc.com/wordpress/archives/2490

For gold only (but highly linked to silver price):
http://socioecohistory.wordpress.com/2012/11/14/annual-chinese-gold-accumulation-since-2000/
http://socioecohistory.wordpress.com/2011/05/25/chinas-gold-demand-overtakes-developed-world/
http://www.proactiveinvestors.com/columns/sprott-s-thoughts/4491/the-shanghai-gold-surprise--4491.html
http://kingworldnews.com/kingworldnews/KWN_DailyWeb/Entries/2013/7/19_Maguire_-_LBMA_Now_Staring_At_Another_Gordon_Brown_Abyss.html