Ningbo Tuopu (SHA:601689) posted first-half attributable net profit of 1.02 billion yuan, down 21% from 1.29 billion yuan the previous year.
Earnings per share fell to 0.59 yuan from 0.75 yuan, according to a filing with the Shanghai bourse.
Operating revenue declined 9.8% year over year to 14.2 billion yuan from 12.9 billion yuan.
Shares of the auto parts company were down 1% in recent trade.