ODP for LS36-1 Gas Field Development Filed With Government

HONG KONG, HONG KONG--(Marketwire - June 11, 2012) -

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Primeline Energy Holdings Inc. ("Primeline" or the "Company") (TSX VENTURE:PEH) today announced that the Overall Development Program for the LS36-1 gas field has been filed with the National Reform and Development Commission of the Chinese Central Government.

About Primeline Energy Holdings Inc.

Primeline is an exploration and development company focusing exclusively on China resources to become a major supplier of gas and oil to the East China market. Primeline has a 75% Contractor's interest in the petroleum contract with CNOOC for Block 25/34 in the East China Sea, or a 36.75% interest in the LS36-1 gas field in Block 25/34 which is being developed by Primeline together with CNOOC (acting as Operator for the Development) and Primeline Petroleum Corp. ("PPC"). Primeline and PPC have also secured a new exploration Block 33/07 covering 5,877 sq km (1.45m acres) of offshore area surrounding the LS36-1 gas field development area. CNOOC is proceeding with the Development and Primeline is leading the exploration effort currently focused on the prospects in the 3D seismic data area where a number of high potential prospects near the LS36-1 Development have been mapped and where the LS35-3-1 discovery (drilled in 2010) is located. The new LS35-3-1 discovery and previously drilled wells in and around Block 33/07 encountered oil and gas shows and flows indicating that there is significant hydrocarbon potential in the remainder of the Block. Shares of the Company are listed for trading on the TSX Venture Exchange under the symbol PEH.

ON BEHALF OF PRIMELINE ENERGY HOLDINGS INC.

Ming Wang, Chief Executive Officer

Please visit the Company's website at www.pehi.com. Should you wish to receive Company news via email, please email bren@chfir.com and specify "Primeline Energy" in the subject line.