PetroChina, founded in 1999 as the listed arm of state-owned CNPC, is Asia's largest oil and gas producer and ranked 32nd on the 2020 Forbes Global 2000. The company made headlines in 2007 with the discovery of the Jidong Nanpu oilfield in Bohai Bay and joined the Hang Seng Index, but also faced divestment from investors like Harvard and Yale over its ties to Sudan. In 2009, it signed a record A$50 billion deal with ExxonMobil to import liquefied natural gas from Australia's Gorgon field, securing a 20-year supply of clean energy. PetroChina expanded globally with a $5.4 billion investment in Canadian shale gas in 2011 and a 2016 agreement to supply 30% of Nepal's petroleum needs. More recently, it partnered with Shell on Australia's Surat project in 2019, posted a US$4 billion profit that year, and has been pivoting toward renewables, installing 5.36 gigawatts of clean energy capacity in 2022. Despite receiving US$343 million in state subsidies in 2023, the company remains a key player in both fossil fuels and the energy transition.