PIP: Using results of a 6 month 1981 extensive social survey in urban districts of Beijing Municipality this paper shows that there is not only a tendency for young people to shift their actual marriage age to an earlier time but also, their earlier marriage does not necessarily result in earlier reproduction. The key to the success of this work of separating marriage and giving birth after a proper interval lies in propaganda and education. Based on their answers to the question "what do you think is the ideal age for marriage," most young males preferred to get married at 24, 25, and 26 years, with 25 as the peak of desired marriage age. Young females mostly choose to get married at 22 through 26; the desire to get married after 26 declines sharply. The ideal marriage ages indicated by the unmarried youth, though earlier than the actual marriage ages of the married young people, are later than what the married ones desire. The overwhelming majority of people become pregnant and give birth promptly after marriage. More than 70% of the married young couples investigated became pregnant and gave birth within 1 year of their marriage; those who believed it "ideal" to get pregnant and give birth within 1 year of the marriage only account for 25% of those surveyed. 1 of the main factors for both husbands and wives to delay giving births is their need to save some money to avoid economic hardship cause by immediate births after marriage. Overall, there exists a marked difference between the actual times of the 1st births of married young people and their ideal times of 1st births.