A Taiwanese company with mainland subsidiaries has fired the nephew of Taiwan’s interior minister, whom Beijing deems responsible for Taipei’s hostile policies towards the mainland.

The mainland subsidiary of Taiwan’s Long Time Technology Co. Ltd in Shanggao county, Jiangxi province, issued a statement on Wednesday night saying Yen Wen-chun, the nephew of Liu Shyh-fang, was dismissed from all positions he held at Long Time Technology and its mainland subsidiaries from April 7.

The statement said the company “solemnly pledged” to strictly require all employees to “stay away from any political behaviour that undermines peace and stability across the Taiwan Strait”.

It also said its corporate funds were used “solely for pure industrial research and development and business development”, “strictly prohibiting any resources from being used to directly or indirectly support individuals or organisations with specific political stances, such as those advocating ‘Taiwan independence’ or violating the one-China principle”.

Beijing’s sanction list banned them and their families from entering mainland China, Hong Kong and Macau, and all companies associated with them are prohibited from engaging in profit-making activities in mainland China.

Beijing had accused Liu of “blatantly promoting separatist ‘Taiwan independence’ rhetoric”, as well as “persecuting mainland spouses in Taiwan and actively creating obstacles to cross-strait personnel exchanges”.

Before the sanction, Yen Wen-chun served as the general manager of Long Time Technology, headquartered in Taiwan’s New Taipei City. The company has promoted Terry Hu, the general manager of its subsidiary in Jiangxi province, to replace Yen, according to the company’s official website.