Around 500 people have protested what they say is a lack of university placements in their central Chinese province, in the latest protest over education reform.

Parents holding banners that read "Fair education" rallied in Zhengzhou city against what they say is a serious shortage of college placements in Henan province.

Sunday's protest in Zhengzhou's Erqi Square ended peacefully.

The Ministry of Education says Henan has more than 207,000 college placements and almost 300,000 students from the province were enrolled in undergraduate courses in the country last year. But 820,000 Henan students have applied to take the university entrance exam this year.