In 2020，due to COVID-19 and the fell of Brent oil price fell and other factors，the global natural gas market demand was weak and output declined，but the supply and demand increased. LNG liquefaction project capacity growth slowed down，but oversupply intensified. Investment in LNG liquefaction projects has shrunk seriously，but investor confidence is still expected to recover rapidly. The prices of the three major natural gas markets hit a record low in the first half of the year，but rose again at the end of the year. Since 2021，the global natural gas market has shown signs of recovery in many aspects. It is estimated that in 2021，the global natural gas market will pick up significantly，the investment in liquefaction projects will gradually recover，the market price will rebound sharply，and the competition between supply and demand will intensify. The buyer’s market is changing to the seller’s market.