Wankai New Materials (SHE:301216) unit Sichuan Zhengda Kai paid 49.6 million yuan in supplementary corporate income tax and 26.4 million yuan in late penalties following a notice from tax authorities.
The payment does not involve administrative penalties, according to a weekend filing with the Shenzhen bourse.
The tax payment will be charged to 2026 earnings, without requiring retrospective adjustments.
Shares of the packaging materials producer closed 5% lower Monday.