Russian President Vladimir Putin offered to expand energy supplies to China on Friday as he neared the end of a two-day visit. “Russia is ready and able to continuously and reliably supply the Chinese economy, companies, cities and villages with ecologically clean and affordable energy, electricity and heat,” Putin said at a Russian-Chinese trade fair in the city of Harbin. On his first trip abroad since the start of his fifth term in office earlier this month, Putin said he was sure the strategic alliance in the energy sector would be further strengthened. Russia has been under growing econom…