Guangdong Jiayuan Technology (SHA:688388) forecast that its net profit attributable to shareholders for the first half will skyrocket by between 879% and 961% to a range of 360 million yuan to 390 million yuan, according to a Shanghai bourse filing on Thursday.
The attributable profit a year earlier was 36.8 million yuan, or 0.09 yuan per share.
Operating revenue is expected to jump by between 82% and 97% year on year to a range of 7.20 billion yuan to 7.80 billion yuan.
The electrolytic copper foil manufacturer's shares dropped 4% at the close.