Chapter 1: Introduction　　1.1 Research Background　　Food is one of four human basic needs (Food,Residence,Clothes,and Medicine).No matter who or where they are,they all need to consume food to survive.Thus,food is considered the most important one among all the basic needs.For this reason,food style has been developed continuously over time.When people produced food,style varied according to taste of each country.Then,it comes to how to prolonging the shelf life and keeping the food fresh,nutritious,delicious and safety.All of which leads to "food preservation" (Brain A,2002).　　Nowadays,food preservation had been dramatically changed since human developed technologies and machine to improve food preservation techniques.One technique that has been widely used is "Freezing" which is to freeze the food into ice,which results to what we call "Frozen Food".　　In China,consumers have just been paying attention to frozen food products for the past 3 to 4 years.However,Chinas frozen food industry has been expanding greatly,the number of over scales enterprises have been growing gradually growing in terms of the rapid development and the relatively high profit,which will attract more companies to enter this industry.As a result of an intense competition,many manufacturers have created various styles and prices of frozen food to increase consumers choice.　　In China,Guangzhou is the third largest city in China and is also the largest in Southern China.Geographically,Guangzhou is a key national transportation hub and trading port.As of 2011 census,the city had a population of approximately 13.5 million (China Daily,2011).Buddhism is the main influential religion in the life of Guangzhou people as well as Thai people (SYSU,2007).Guangzhou is the main manufacturing hub of the Pearl River Delta,one of mainland Chinas leading commercial and manufacturing regions.In 2010,the GDP reached 1,060,448 million RMB,while GDP per capita was 30,658 RMB(Statistics Bureau of Guangdong,2010).The growing economy of Guangzhou has influenced to the consumers purchasing power increased;their monthly average salary after tax is 2,196 RMB(www.numbeo.com,2012).Chinese have the reputation for eating,especially Guangdong people(www.cnngo.com,2011).