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The presence of complex organic molecules (COMs) in the interstellar medium(ISM) is of great interest since it may link to the origin and prevalence oflife in the universe. Aiming to investigate the occurrence of COMs and theirpossible origins, we conducted a chemical census toward a sample ofprotostellar cores as part of the ALMA Survey of Orion Planck Galactic ColdClumps (ALMASOP) project. We report the detection of 11 hot corino sources,which exhibit compact emissions from warm and abundant COMs, among 56 Class 0/Iprotostellar cores. All the hot corino sources discovered are likely Class 0and their sizes of the warm region ($>$ 100 K) are comparable to 100 au. Theluminosity of the hot corino sources exhibits positive correlations with thetotal number of methanol and the extent of its emissions. Such correlations areconsistent with the thermal desorption picture for the presence of hot corinoand suggest that the lower luminosity (Class 0) sources likely have a smallerregion with COMs emissions. With the same sample selection method and detectioncriteria being applied, the detection rates of the warm methanol in the Orioncloud (15/37) and the Perseus cloud (28/50) are statistically similar when thecloud distances and the limited sample size are considered. Observing the sameset of COM transitions will bring a more informative comparison between thecloud properties.

ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud