u like salted eggs? duck eggs? now, think twice before eating them ... especially if the egg yolk has a "bright red" hue ....... cos, it's probably the result of some industrial coloring -- which can result in cancer. Sorry, the english term for the industrial coloring i don't know ......
i don't know what to say of the chinese agricultural industry ....... the key goal is to make money and there is no regard for the safety of others...... ;(
for full story, read this.