This photo from Rodong Shimmun newspaper's website on Feb. 28 shows North Korean workers staging a pep rally in achieving a new five-year state economic development plan the country leader Kim Jong-un introduced in January this year. Yonhap

North Korea has staged worker pep rallies en masse across the country to boost morale in achieving a new five-year state economic development put forward by leader Kim Jong-un last month, the country's state media said Sunday.

The North's official Korean Central News Agency (KCNA) reported that workers' rallies aimed at encouraging the fulfillment of the year-one goals of the five-year economic plan were held in multiple industrial fields and units.

The rallies were held as answers to an earlier one staged at the Hwanghae Iron and Steel Complex, where workers affirmed their commitment to meet production targets and achieve the first-year goals of the plan, according to the KCNA.

North Korea unveiled the new five-year economic development plan at the eighth congress of the Workers' Party last month, with a focus on self-reliance.