The techniques of roasting and broiling (grilling) meats were established early in China's history, as far back as the Shang dynasty (1523-1027 BC). In fact, the Chinese have been known to cook their food since 40,000 BC, or around the time that fire is thought to have been discovered. The earliest roasting was done by heating slabs of stone and then roasting the raw food upon them, though most people know the famous essay by Charles Lamb on how the delights of roast pig were discovered in the dawn of Chinese culinary history when a farmer's house (sheltering his pigs) was burned down.