  Reactor neutrinos play an important role in determining parameter theta_{13}
in the lepton mixing (PMNS) matrix. A next important step on measuring PMNS
matrix could be to build another reactor neutrino experiment, for example, DaYa
bay in China, to search the possible oscillations via sin^2 (2theta_{13}) and
Delta m^2_{13}. We consider 4 different schemes for positions of three 8-ton
detectors of this experiment, and simulate the results with respect to an array
of assumed ''true'' values of physics parameters. Using three kinds of analysis
method, we suggest a best scheme for this experiment which is to place a
detector 2200m ~ 2500m symmetrically away from two reactors, and to put the
other two detectors closer to their corresponding reactors respectively, almost
at a 100m ~ 200m distance. Moreover, with conservative assumption on the
experimental technique, we construct series of allowed regions from our
simulation results, and give detailed explanations therein.
