Mongolia, the biggest supplier of coal to China’s steel industry, is changing the way it sells its product in a bid to improve transparency and reap better returns from its top export earner.

Hit by a scandal last year that saw hundreds of thousands of tons pilfered from state stockpiles on the border, the government is moving to an auction system that will replace the long-term contracts favored by Chinese buyers and impose additional transport costs on customers. Beijing has sought to expand its coal trade with Mongolia in recent years, particularly after halting shipments from Australia, formerly its number 1 supplier of the higher-grade mineral required for blast furnaces.

Mongolia sets goal to sell 12 million tonness via auction by July. The government intends to use auctions for all its coal sales — including the coking variety for steel mills and thermal coal for power plants — in 2024 and 2025, according to an emailed response to questions.

China is by far the biggest buyer of Mongolian goods. Coking coal imports from its northern neighbor amounted to nearly 26 million tonness last year — 40 percent of total purchases. The new auction system also coincides with a rapprochement in Beijing’s relations with Canberra, which has seen Australian coal shipments resume after being banned since late 2021.

Sales listed so far on the Mongolian Stock Exchange, which is hosting the auctions that began this month, have totaled 128,000 tons, according to the bourse’s website.