The affair of the phantom buses has prompted questions about whether the ruling Communist Party's financial support to an industry it is spending heavily to promote might be disrupted.
The Finance Ministry announced that five manufacturers were fined for fraudulently collecting a total of more than 1 billion yuan (USD 120 million) in subsidies. Chinese news reports, citing unidentified industry sources, say as many as 20 others might be in trouble.
"'Subsidy fraud' will do a lot of damage to development of the new energy vehicle industry," the deputy general secretary of the China Association of Automobile Manufacturers, Xu Yanhua, told the newspaper Economic Observer.
Communist leaders see electric cars, solar and wind power and other "new energy" as promising fields with no established competitors where China can take a leading global role and reap higher-paid jobs and economic growth.
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Boosted by government subsidies, China passed the United States last year to become the biggest electric vehicle market by units sold.
Most Chinese-made electric vehicles are sold in China, but BYD has sold buses in California and taxis in Europe.
Beijing paid 33.4 billion yuan (USD 5 billion) in subsidies to electric vehicle makers in 2009-15, according to the Finance Ministry. On top of that, Shanghai and other cities encourage sales by waiving license plate fees of up to 100,000 yuan (USD 15,000).
Manufacturers can receive rebates of up to 500,000 yuan (USD 76,000) per bus or 50,000 yuan (USD 7,500) per car. A Cabinet statement said authorities were ordered to "tighten control" over subsidies. It told local authorities to prevent finance officials from helping automakers to obtain improper subsidies but did not indicate how payouts might change.
Zeng said for now, companies can collect government money for assembling parts bought from other suppliers to make a truck or bus while doing no research or development of their own.