 PetroChina PTR, 1.81 , China Life Insurance LFC, 2.32 , Sinopec SHI, 0.50 and Aluminum Corp. of China ACH, 0.98 have separately announced their intention to delist from the New York Stock Exchange, a unit of the Intercontinental Exchange ICE, 0.55 . The dates vary but the last trading days are scheduled for late August and early September. 