 Chinese food staples such as rice, soy sauce, noodles, tea, and tofu, and utensils such as chopsticks and the wok, can now be found worldwide.The preference for seasoning and cooking techniques of Chinese provinces depend on differences in historical background and ethnic groups.Geographic features including mountains, rivers, forests and deserts also have a strong effect on the local available ingredients, considering that the climate of China varies from tropical in the south to subarctic in the northeast.