An investigation launched in January found that Chinese dumping activities had seriously hurt domestic producers of aluminium, with some having to suspend output, the Ministry of Industry and Trade said.

The anti-dumping tax on some aluminium products from 16 Chinese companies ranges from 2.49% to 35.58% and took effect for five years from Sept. 28, the government said on its website on Wednesday.

Aluminium imports from China nearly doubled last year to at least 62,000 tonnes, the ministry added. The figure excluded the amount of aluminium that transited through Vietnam.

In June, Vietnam had imposed an anti-dumping tax of 3.45% to 34.27% on some Chinese steel products. [nL4N23Q2L5]

This year, Vietnam said it would crack down on goods of Chinese origin illegally labelled "Made in Vietnam" by exporters seeking to avoid U.S. tariffs on products made in China. [nL4N23H11G]

Vietnam relies on China, its largest trading partner, for materials and equipment for its labour-intensive manufacturing.

Vietnam's trade deficit with China widened to $25.11 billion in the first eight months of this year, from $17.23 billion a year earlier.

(Reporting by Khanh Vu; Additional reporting by Phuong Nguyen; Editing by Clarence Fernandez)