EVERY Friday afternoon in Peking, Chung Wen, a government clerk, picks up his three-year-old son from one of the city's few kindergartens. On Monday mornings Chung's wife, a primary school teacher, returns Xiao Chung (Little Chung) to his child-care center, or creche, and says goodbye to her son for another week.
''We would like to have Xiao Chung with us during the week,'' says Mr. Chung, ''but we don't have anyone to look after him, and with both of us working it would be impossible to pick him up every night.''
The Chungs (not their real name) both finish work around 5 o'clock, and they have the choice of a bicycle or the city's lumbering public transport system to take them home.
''We have to shop every night because we don't have a refrigerator. That alone can take two or three hours,'' says Mr. Chung. ''If we then had to pick up my son every night, there would be no time for cooking our meal or housekeeping.''
The Chungs are one of China's new generation of nuclear families, which now account for almost 70 percent of the nation's households and which are changing the shape of family life in China.
Traditionally, Chinese society has been based on the extended family, with up to four generations all living under one roof. The old courtyard houses popular until this century made such living easier, with their separate rooms leading into a central yard affording some privacy to members of the family.
But in the decades following the 1949 Communist takeover, peasants and soldiers swarmed into China's cities from the countryside, setting up households of their own. It is the offspring of these families, who in the past decade have been forced to find their own accommodations on growing up, that now account for many of the city's nuclear families.
A rise in individual incomes and the greater availability of separate housing have encouraged other newly married couples to set up housekeeping on their own, according to China's leading sociology professor, Fei Xiaotong. Professor Fei says, too, that older Chinese are also encouraging the trend toward smaller households because of the peace and quiet it affords them.