2, for the website chain, the establishment of Links
A: gray hat Shanghai dragon is equivalent to the effective white hat Shanghai dragon, white hat may be about 3 months or longer, but the black hat Shanghai dragon, likely to be K drop right greatly reduced. This is also a lot of Shanghai dragon ER frequently used Shanghai dragon technology.
my personal understanding is more than the white hat search engine optimization, more standardized than black hat called gray hat Shanghai dragon technology. Although he is in the middle, but for a search engine is the most secure.