There has been an interesting debate on the quantum versus classical origin of ghost imaging in thermal light. To clarify this quantum-classical dilemma, Lixiang Chen at Xiamen University of China formulated a density matrix to fully describe thermal two-photon orbital angular momentum state, which revealed the hidden quantumness with non-zero discord. Then, a scheme of mimicking teleportation was devised to demonstrate the possibility of teleporting an optical image, with an accompanying featureless background.