Our study on the multiplantation progeny test started in 1976 and was completed in 1978. Results of this study show the high proportional contribution of variance components of the family U3 site interaction (10~20%), which indicates that the GEI in Chinese fir was very significant.According to their genotypic stabilities observed in this study, the families investigated in the multiplantation progeny test can be divided into three classes, i. e, "fast growing stability" (20~25%), "variable" (50~60%) and "slow growing" (20~25%).Our investigation indicated that in the halt-sib progeny tests carried out in three different locations with a common genetic check, family mean repeatability for Chinese fir was found to be 0.691. However, when progeny tests were carried out in two different locations family mean repeatability turned up to be about 0.533. Finally, when full-sib progeny tests were carried out in two different locations results showed a family mean repeatability around 0.52.