Sr2CuO2Cl2. signifies a virtually suitable circumstance of the two-D antiferromagnetic CuO2-aircraft and therefore is of unique curiosity during the context with the origins of high TC superconductivity. We have calculated experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) along with the resonant improvement of valence photoemissionat the https://okada4dsg.com/