BAIINFO-China, Domestic GPC market performed stable-and-weak in Apr. Major refineries’ low-sulfur GPC prices grew steadily while mid and high-sulfur GPC prices increased then stabilized. Independent refineries’ GPC prices declined then increased and finally fell back at high levels. Imported GPC shipments were acceptable. Compared to the end of Mar., Sinopec refineries’ GPC prices generally rose by RMB 20-140/T. CNPC/PetroChina refineries’ GPC prices ascended by RMB 30-280/T.