 BEIJING, July 12, 2021 PRNewswire -- Huaneng Power International, Inc. HPI, the Company NYSE: HNP; HKEx: 902; SSE: 600011 today announced its electricity sold in the first half of 2021. According to the preliminary statistics, for the second quarter of 2021, the Companys total electricity sold by power plants within China on consolidated basis amounted to 102.917 billion kWh, representing an increase of 12.51 over the same period last year. 