Newcastle coal futures, the benchmark for Asia's largest coal-consuming region, fell below $170 per tonne, the lowest level since January 2022 due to higher production and weak demand outside China. China's coal output rose 5.8% YoY to 734.23 million tonnes in Jan-Feb 2023, as the government encouraged miners to boost production. Also, India produced a record 73.02 million tonnes of coal in Apr 2023, up 8.67% YoY, reducing reliance on imports. However, after a fatal accident in Inner Mongolia, China has temporarily suspended operations at 32 coal production sites in the region to carry out nationwide safety checks. Despite an increase in clean energy generation, coal accounted for 64% of China's Q1 2023 electricity generation. In contrast, the EU burned less coal and gas from Oct 2022 to Mar 2023, with coal generation down 11% YoY and gas generation down by 38 terawatt hours. please summarize and prospect coal price in the future