Hundreds of teachers protested in front of the government office building in Hengyang county in Hunan province earlier this week, seeking years of unpaid increase in the national salary schedule.

Police summoned six of them for impeding traffic as their rally blocked the main road and disturbing government office regular operations, according to a report by the website of People's Daily, citing a statement from the county government.

The local government said that it had promised on April 26 to respond to the teachers' request within 10 working days when they learned the teachers' requests from online posting, but teachers were unsatisfied and more than 200 of them went on protest in front of the government building for more than nine hours on Tuesday.

On Wednesday morning, more than 150 teachers gathered at the government gate again and would not leave despite all efforts. Their behavior greatly disrupted traffic and government orders, according to the statement.

Other media reports said the teachers are requesting for the salary increase since Oct 2014 under the national plan of salary increase and they also demand the year-end bonus of the past two years.

The teachers also claimed that irregularities have been found in their pension and housing subsidy accounts.

The government statement said Xiong Chaoqun, the county chief, held a meeting with officials in charge of educational affairs in the county and mapped out "a principle to settle the problem" after the government noticed the teachers' requests online. No details of the principle were given.

In the teachers' public letter to the government, they said they had not got a clear answer from the government.