China is arising fast in the world while benefiting from its 5000 year long history. Up-to-date, there are more than 30 World Heritage Sites listed by UNESCO in China, among which you are mostly going to see are the sites that comprise the most essential part of China's valuable and rich tourism resources. They are: The Great Wall of China, The Forbidden City, Imperial Tombs of the Ming and Qing Dynasties, The Temple of Heaven, The Summer Palace; The Mausoleum of the First Emperor of the Qin Dynasty and Terracotta Warriors and Horses; Dazu Rock Carvings; The Ancient Town of Lijiang; Classic Gardens in Suzhou; Mount Huangshan, Xidi and Hongcun Villages, Museums of Ming-Qing Architecture in Southern Anhui; Mount Taishan; The Confucian Temple, Cemetery and Family Mansion in Qufu; The Potala Palace in Tibet; The Mogao Grottoes; Mountain Resort and Outlying Temples in Chengde etc.
You may not be sure about what to see and where to go at the time you are planning a trip to China. You can find some help or suggestion at the link Where to go & what to see, no matter you are fresh or experienced for a travel to China. Each of the above mentioned historical or cultural sites can be designed into various itineraries. You can find some examples for tour packages to China on the website of China Visit Tour. When you go through the itineraries, you can read some information or knowledge about attractions, and suggestions to do on a tour. If you travel in a family group or together with friends, you may want a custom itinerary to fit your specific dates and length of your vacation, to follow your travel pace, and to meet your travel budget. Here is the link to get some information about a private and custom tour.
When you make a travel to China, prepare well before hand and make it enjoyable, comfortable, valuable and unforgettable.