Ключевые слова: 20 to 24 years old, 25 years old to 29 years old, accompanied, action, adults, adults only, adventure, asia, asian, asians, backpackers, beijing, camping, casual, china, chinese, chinese culture, color pictures, communication technology, computer, cool, daylight, east asia, ecological tourism, enjoyment, exercise, exploration, field, freedom, friendship, grin, guidance, half length, happiness, happy, happy to the extreme, healthy, healthy lifestyle, heterosexual, historical buildings, holding, horizontal format, interpersonal relationship, laptop computer, leisure, leisure activities, life style, looking away, mountain, nature, non urban scenery, notebook computer, outdoor, outdoor activities, partner, pastoral scenery, people, pleasure, positive, radio technology, red, relaxation, remote, smile, sports, standing, sunlight, the environment, the front view, the great wall, the international famous scenic spots, tourism, tourist destination, traveler, traveling, two people, walking, walls, weekend activities, women, yellow, young people, young women, youth culture,