The advert, which warned of possible social conflict, contained lines such as "Hong Kongers have had enough!" and "This city is dying, you know?".
"Why are mainland mothers flooding in to take up resources in public hospitals, getting our benefits and social welfare?'' one of the organisers of the campaign told the South China Morning Post newspaper.
BBC News - Hong Kong advert calls Chinese mainlanders 'locusts'
acutally sg also got similar problem, but hong kong case is worst..