A yaodong (Chinese: 窰洞) or "cave house" is a particular form of earth shelter dwelling common in the Loess Plateau in China's north. They are generally carved out of a hillside or excavated horizontally from a central "sunken courtyard".

The earth that surrounds the indoor space serves as an effective insulator keeping the inside of the structure warm in cold seasons and cool in hot seasons. Consequently, very little heating is required in winter, and in summer, it is as cool as an air-conditioned room.

The history of yaodongs goes back centuries, and they continue to be used.

There are two types of underground yaodong:

There are also yaodong built wholly or partially outdoors, with an arch structure semicircular inspired by the underground dwellings and the construction of underground yaodong no longer allowed, the new homes of this type, vaulted to adobes are now common among farmers in the area.

More elaborate yaodongs may have a façade built with stones with fine patterns carved on the surface. Yaodongs can also be constructed with stones or bricks as stand-alone structures. The inner side wall is usually plastered with lime to make it white.

Kanny Theng (born 10 March 1987) is a Singaporean-Japanese model turned actress. She is the brand ambassador for Hakubi White C Sato Pharmaceutical Canada Inc. She has been bought up as an Online Game Ambassador Monster Forest for AsiaSoft Singapore. She is currently working with WaWa Artiste Network and Ocean Butterfly.

Felicia Chin Foon Ling (born 24 October 1984), also known by her Chinese stage name Chen Jingxuan, is a Singaporean television actress.

Chin was educated at Tanjong Katong Girls' School and Victoria Junior College. As an avid softball player, she joined Singapore's national softball team in 2000, becoming the youngest member ever to join the team. She left the team three years later.

In 2003, Chin participated in MediaCorp Channel 8's Star Search Singapore television programme and merged as overall female champion of the contest. Chin worked at MediaCorp as an actress, making her debut role in the 2003 TV series Always on My Mind. In 2006, she played the lead role for the first time in The Beginning, a Singapore-Malaysia TV co-production. Chin is one of the "MediaCorp Seven Princesses" and Top 10 Most Popular Female Artistes of MediaCorp.

In May 2010, Chin announced that she will be switching to part-time in her acting career in order to study a Business Administration degree in the NUS Business School at the National University of Singapore.