question: What were the BeiDou-1 system satellites based on ?
answer: the Chinese DFH-3 geostationary communications satellite
turker_answer: The BeiDou-1 system satellites were based on the Chinese DFH-3 geostationary communications satellite .
rule-based: The BeiDou-1 system satellites were based on the Chinese DFH-3 geostationary communications satellite .