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We take the viewpoint that X(1576) is the tetraquark state which consists of a scalar diquark and an antiscalar-diquark in relative P-wave, and calculate its mass in the framework of the QCD sum rule approach. The numerical value of the mass mx = (1.66 ± 0.14) GeV is consistent with the experimental data. There might be some tetraquaxk components in the vector meson X(1576).