Sr2CuO2Cl2. signifies an almost excellent situation of the two-D antiferromagnetic CuO2-plane and thus is of particular desire from the context in the origins of higher TC superconductivity. We now have measured experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) and the resonant improvement of valence photoemissionat the https://okada4dsg.com/