Shareholders of Petro-king Oilfield (HKG:2178) will meet June 12 to vote on the renewal of an agreement by three units to purchase certain products from Petro-king Energy Technology, a Tuesday filing with the Hong Kong bourse said.

The units will buy well completion, production enhancement, and drilling products under the contract for not more than 20 million yuan.

The parties entered into the renewal contract earlier in May.