Wǒ měi cì dōu zài Zhōngshíhuà de jiāyóuzhàn jiāyóu.
I always fill up at Sinopec gas stations.
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中石化 is a contraction of 中国石油化工 (Sinopec Group). Alongside 中石油 (PetroChina/CNPC) and 中海油 (CNOOC), it is one of the 'big three' state oil majors that dominate China's energy sector.