Sina fights off unwelcome bidders

From BBC News: Sina fights off unwelcome bidders

"Sina came up with the scheme within days of online games firm Shanda Interactive Entertainment revealing it had acquired 19.5% of Sina's shares.
If Shanda lifts its holding to 20%, Sina shareholders get the right to buy Sina shares at half price. The scheme - known as a "poison pill" would allow Sina to issue new shares. " Read more