A mainland spokesman on Wednesday condemned the ruling Democratic Progressive Party of Taiwan in supporting an island teacher's verbal attacks on mainland students studying on the island.

An assistant professor from Chung Yuan Christian University recently made discriminatory and offensive comments on mainland students during the class.

The teacher teased mainland students about the Sanlu milk powder scandal on the mainland and used the term "Wuhan Pneumonia", to refer to the COVID-19 outbreak, disparaging the mainland.

In 2008, thousands of babies on the mainland fell ill after drinking substandard milk powder produced by Sanlu Group, a large dairy company in North China's Hebei province.

The students complained to the school. Island authorities then expressed their support for the teacher.

In response, Ma Xiaoguang, spokesman for the State Council Taiwan Affairs Office, said the teacher openly spread discriminatory and offensive political remarks in class, which seriously violated academic and professional ethics.

Ignoring the facts, island authorities defended the teacher in high profile comments, which further proves that they were the "protective umbrella" for the "anti-mainland" forces in Taiwan, Ma said.

Acts and the connivance of DPP authorities have worsened the cross-Straits educational exchanges and the normal and healthy environment for mainland students studying in Taiwan, he said.