China discovers its first large deep-water deep-stratum gas field with proven reserves exceeding 50 billion cubic meters in the sea southeast of Hainan Province on October 20, 2022. According to the China National Offshore Oil Corp (CNOOC), the gas field called "Baodao 21-1" achieved the biggest drilling breakthrough in the Songnan-Baodao area in more than 50 years. Photo: VCG