June 25th, 2008 - 07:32 GMT QPI , PetroChina & Shell sign LOI for refinery and petrochemical manufacturing and marketing in China In the presence of Sheikh Tamim Bin Hamad Al-Thani, the Heir Apparent of the State of Qatar, Qatar signed on June 23 with PetroChina Company Limited (PetroChina), and Shell (China) Limited (Shell), a Read more