The link in the answer above shows a very unusual moongate. The more typical moongate is a circular hole big enough to walk through, cut into a solid outdoor wall. The bottom part of the circle is cut off to provide a flat area to walk on.

http://en.wikipedia.org/wiki/Moon_gate
http://images.search.yahoo.com/search/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fei%3DUTF-8%26p%3Dchinese%2520moon%2520gate%26fr2%3Dtab-web%26fr%3Dyfp-t-315-s&w=375&h=500&imgurl=static.flickr.com%2F22%2F26965033_7114fba2f1_m.jpg&rurl=http%3A%2F%2Fwww.flickr.com%2Fphotos%2Fjaycollier%2F26965033%2F&size=68.4kB&name=26965033_7114fba2f1.jpg&p=chinese+moon+gate&type=jpeg&no=16&tt=110&oid=21d0e4ddce4bbfec&fusr=jaycollier&tit=Moon+Gate%2C+Portland+Classical+Chinese+Garden&hurl=http%3A%2F%2Fwww.flickr.com%2Fphotos%2Fjaycollier%2F&ei=UTF-8&src=p

Chinese is fancier. With the red & yellow colors. Western is more plain and flatter.

no,very different , the architecture in beijing just like the Forbidden City is very different from the tang and song dynasty architecture ,not to mention before, the style of tang and song architecture is like the japanese architecture .because japan learnt it from china during tang dynasty

Imperial architecture

The yellow roof tiles and red walls are visible in this Forbidden City image of a building under snow.There were certain architectural features that were reserved solely for buildings built for the Emperor of China. One example is the use of yellow roof tiles; yellow having been the Imperial color, yellow roof tiles still adorn most of the buildings within the Forbidden City. The Temple of Heaven, however, uses blue roof tiles to symbolize the sky. The roofs are almost invariably supported by brackets, a feature shared only with the largest of religious buildings. The wooden columns of the buildings, as well as the surface of the walls, tend to be red in colour.

The Chinese dragon, an emblem reserved for the imperial regime, were heavily used on imperial architecture – on the roofs, on the beams and pillars, and on the doors. Only the buildings used by the imperial family were allowed to have nine gan (space between two columns); only the gates used by the Emperor could have five arches, with the centre one, of course, being reserved for the Emperor himself. The ancient chinese favored the color red. The buildings faced south because the north had a cold wind.

Beijing became the capital of China after the Mongol invasion of the 13th century, completing the easterly migration of the Chinese capital begun since the Jin dynasty, the Ming uprising in 1368 reasserted Chinese authority and fixed Beijing as the seat of imperial power for the next five centuries. The Emperor and the Empress lived in palaces on the central axis of the Forbidden City, the Crown Prince at the eastern side, and the concubines at the back (therefore the numerous imperial concubines were often referred to as "The Back Palace Three Thousand"). However, during the mid-Qing Dynasty, the Emperor's residence was moved to the western side of the complex. It is misleading to speak of an axis in the Western sense of a visual perspective ordering facades, rather the Chinese axis is a line of privilege, usually built upon, regulating access – there are no vistas, but a series of gates and pavilions.

Numerology heavily influenced Imperial Architecture, hence the use of nine in much of construction (nine being the greatest number) and reason why The Forbidden City in Beijing is said to have 9,999.5 rooms – just short of the mythical 10,000 rooms in heaven. The importance of the East (the direction of the rising sun) in orienting and siting Imperial buildings is a form of solar worship found in many ancient cultures, where the notion of Ruler is affiliated with the Sun.

are they doing a good job of "preserving" the Tibetans?

They are very superstitious. The shapes promote good fortune.

Ancient Chinese buildings were made of wood. Description of other materials used see section on "Foundation" and "Wooden Frame" Timber was readily available and easily transportable. So no special tools were used. ohttp://en.wikipedia.org/wiki/Ancient_Chinese_wooden_architecture
And http://www.xabusiness.com/china-resources/ancient-china-architecture.htm

American ingenuity at it’s best. I’m a professional photographer and I’m just floored by this.