The following is a summary of chapters 4-6 of the Good Earth. A more detailed chapter by chapter summary of the entire book can be found: http://www.bookrags.com/The_Good_Earth/
Following a local custom, Wang Lung buys fifty eggs and dyes them red in honor of the new baby. In a short time, O-lan resumes her work with her husband in the fields. That year, the harvest is a rich one, and the frugal Wang Lung manages his affairs well, in contrast to his lazy uncle and his wife. During the winter, he even manages to save some silver pieces.
For the New Year celebrations, O-lan makes rice cakes, and Wang Lung and she take their son to the House of Hwang. O-lan presents the boy to the Old Mistress and gives the cakes to the ladies in the house. O-lan learns from the cook that the Hwang family has fallen on hard times because of the spendthrift habits of the young men, and the family wishes to sell some land. Wang Lung decides to buy the land and is proud of his new acquisition.
In spring, he and O-lan labor on their new land. In the fall, O-lan gives birth to a second son, and Wang Lung is happy with his good fortune. His plentiful harvests continue, he saves money from the sale of his produce, and he earns a reputation in the village as a man of substance.