It is the loss of tooth surface substance caused by germs (bacteria).
SEE ALSO Hong Kong fun guide | Hong Kong business hotels | Shanghai shopping guide | Kuala Lumpur shopping guide | Bangkok shopping guide | Singapore shopping guide | Macau guide| Tokyo | Songdo fun guide | Manila fun guide | Hanoi fun guide Lee Tung Avenue - the former Wedding Street - in Wanchai is a reconstituted and gentrified shopping and foodie hub with brand names as well as bargain stalls in surrounding streets/ photo: Vijay Verghese JUMP TO Causeway Bay | Wanchai | Admiralty | Central | Peak, Stanley, Horizon Plaza | Taikoo Shing | TST and Kowloon | Mongkok | Kowloon Tong, Shatin | Kowloon Bay, Telford Plaza | Citygate and Airport duty-free shopping THE Hong Kong shopping experience is always wild, often glitzy, pushy, but never tame.
Tame is for old-fogey discount stores in Penang or Hawai.
For cosmetics, beauty and skin care products there's FANCL, Jurlique, and Make up Forever.
The large sport b Paris at street level on Jaffe Road at the back entrance is for the casually, or energetically elegant and has little to do with sports. Try Titicaca on P3, a small store selling Peruvian style woollen scarves for HK$199 and knitted tops for HK$599 and up. Between wtc more and Sogo in the warren of side lanes criss-crossing Jaffe Road and Lockhart Road, you'll find an arsenal of cheaper stores selling shoes, women's accessories, cosmetics and jeans.
Find shoes and leather goods in B1 and food in B2 while cosmetics are easily accessed on the teeming street level ground floor.