The follow link is about the peoples of China and Okinawa and the following text is from the site:
http://www.westonaprice.org/traditi...d_in_china.html
"Before we throw up our hands and decide that no conclusions can be made about diet and health in China, let us turn our attention to the mixed peoples of Okinawa, situated equidistant from Hong Kong and Tokyo. The average lifespan for women in Okinawa is 84 (compared to 79 in American), and the island boasts a disproportionately large number of centenarians. Okinawans have low levels of chronic illness—osteoporosis, cancer, diabetes, atherosclerosis and stroke—compared to America, China and Japan, which allows them to continue to work, even in advanced years. In spite of Okinawa’s horrific role in World War II, as the site of one of the bloodiest battles of the Pacific, Okinawa is a breezy, pleasant place, neither crowded nor polluted, with a strong sense of family and community and where the local people produce much of what they consume.
And what do Okinawans eat? The main meat of the diet is pork, and not the lean cuts only. Okinawan cuisine, according to gerontologist Kazuhiko Taira, “is very healthy—and very, very greasy,” in a 1996 article that appeared in Health Magazine.19 And the whole pig is eaten—everything from “tails to nails.” Local menus offer boiled pigs feet, entrail soup and shredded ears. Pork is cooked in a mixture of soy sauce, ginger, kelp and small amounts of sugar, then sliced and chopped up for stir fry dishes. Okinawans eat about 100 grams of meat per day—compared to 70 in Japan and just over 20 in China—and at least an equal amount of fish, for a total of about 200 grams per day, compared to 280 grams per person per day of meat and fish in America. Lard—not vegetable oil—is used in cooking.
Okinawans also eat plenty of fibrous root crops such as taro and sweet potatoes. They consume rice and noodles, but not as the main component of the diet. They eat a variety of vegetables such as carrots, white radish, cabbage and greens, both fresh and pickled. Bland tofu is part of the diet, consumed in traditional ways, but on the whole Okinawan cuisine is spicy. Pork dishes are flavored with a mixture of ginger and brown sugar, with chili oil and with “the wicked bite of bitter melon.”
Weston Price did not study the peoples of Okinawa, but had he done so, he would have found one more example to support his conclusions—that whole foods, including sufficient animal foods with their fat—are needed for good health and long life, even in the Orient. In fact, the Okinawan example demonstrates the fallacy of today’s politically correct message—that we should emulate the peoples of China by reducing animal products and eating more grains; rather, the Chinese would benefit by adding more strengthening animal foods to their daily fare.
Proponents of the low-fat school argue that the Chinese cannot afford to devote more land to animal husbandry. Consider, however, the fact that the Chinese grasslands, concentrated in the semi-arid lands of the north and west, cover nearly forty percent of China, an area three times that under cultivation. Such lands do not support crop production but are highly suited for grazing purposes—for the production of meat and milk—and many Chinese have proposed that efforts be made in this direction. The Beijing Food Research Institute, however, has opposed such measures. Its director, Wang Qing, who is credited with turning China away from dairy development, contends that cow’s milk is a food for the elite, and dairying much too expensive for China to pursue.20 He argues that the Chinese cannot consume dairy products because they are lactose intolerant—but even the lactose intolerant can consume dairy products in limited amounts21, especially fermented dairy products. Meat and dairy products from land that currently is not being used would provide just those nutrients now lacking in the typical Chinese diet—protein, calcium and fat soluble vitamins. Under Qing’s direction, however, China has opted for increased cultivation of valuable agricultural lands in soybeans, in order to provide factory-produced, mineral-blocking, protein-poor soymilk to the populace."
Some questions about low carb dieting
One thing however, is that the climate there is not pleasant during the summer. It is hot and very humid. Also, Okinawain people are very hard working people. The work they did was amazing! Perhaps, another fact for their long-life span might be that before the Japanese took the island back, Okinawians paid no or very little taxes. The US government paid for just about everything. So, if you want better health, pay less taxes! 
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