Unionized delivery workers of the country's leading logistics firm CJ Logistics will hold a massive rally on Monday in central Seoul.

The parcel delivery union, a member of the Korean Confederation of Trade Unions(KCTU), plans to stage the rally at 2 p.m. at the Cheonggye Plaza in Seoul.

The protesters will ask the firm to implement its agreement with the government to improve working conditions for delivery workers and accept calls for dialogue.

A union official said that about two-thousand people will attend the rally, being held in conjunction with the minor opposition Justice Party's election campaign.

The union, which has been staging a strike for about two months, plans to consider extending the strike to other logistics companies unless CJ management accepts calls for discussions.