On the morning of New Year’s Day in Juche 111 (2022), the respected Comrade Kim Jong Un had a meaningful photo taken with merited persons and labour innovators. Among them was Hyon Ok Ju, manager of the thermal insulation building materials branch factory of the Pyongyang Thermal Power Station.
Her name in the power station reminds every employee of insulating brick first. Because she, though a married woman, made quality insulating brick by herself and contributed to the development of the country’s electric power industry.
For years, she groped for a way to produce insulating brick at her factory. And finally one day she hit upon an idea as she saw white soot from the thermal power station.
“Wouldn’t it be possible to make insulating block from that white soot and locally-available clay, which is able to boost power generation while preventing environmental pollution?” she thought.
She made up her mind to undertake that ambitious research project. But it was not a royal road.
Busy as she was with her business affairs, she developed technical specifications of insulating brick one by one and made painstaking efforts to resolve problems arising in making it.
Sometimes she hesitated and despaired due to the repeated failure. But she got up and eventually succeeded in making the first trial products with help from scientists, technicians and workers of the power station.
Later, an insulating brick production process based on white soot was set up at her branch factory. For its better refractoriness and insulating qualities than the previous ones, her insulating brick helped further increase the per-generator output.
And she intensified the research into improving technical specifications of the brick to raise the combustion efficiency of boilers.
Now, she continues her journey of devotion to keep the bright light at the windows of all families.
More From Naenara (En)
Inhabitants of Ragwon County, widely known throughout the DPRK along with Ragwonpho associated with the legend of great love,
February 07, 2026
Inhabitants of Ragwon County, widely known throughout the DPRK along with Ragwonpho associated with the legend of great love,
The “Farm Machines Development-2025” is going on with splendour at the Three-Revolution Exhibition House. On display at the
February 07, 2026
The “Farm Machines Development-2025” is going on with splendour at the Three-Revolution Exhibition House. On display at the
A meeting of workers and trade union members to hear impressions of the reminiscences on the virtues of the peerlessly great men
February 07, 2026
A meeting of workers and trade union members to hear impressions of the reminiscences on the virtues of the peerlessly great men
On February 7, 2016, the DPRK launched an earth observation satellite Kwangmyongsong 4 and put it into its designated orbit. The
February 07, 2026
On February 7, 2016, the DPRK launched an earth observation satellite Kwangmyongsong 4 and put it into its designated orbit. The
Pyongyang municipal industrial design exhibition on the theme of “New era of regional transformation and industrial design”
February 07, 2026
Pyongyang municipal industrial design exhibition on the theme of “New era of regional transformation and industrial design”
Youth and students in Pyongyang met with a war veteran on February 5 to mark the 78th founding anniversary of the Korean
February 07, 2026
Youth and students in Pyongyang met with a war veteran on February 5 to mark the 78th founding anniversary of the Korean
Agricultural workers in the DPRK met with a DPRK hero on February 5 on the occasion of the 78th founding anniversary of the Korean
February 07, 2026
Agricultural workers in the DPRK met with a DPRK hero on February 5 on the occasion of the 78th founding anniversary of the Korean
The Power-driven Machine Institute of the State Academy of Sciences has developed a 15-hp hybrid tractor in keeping with the trend
February 06, 2026
The Power-driven Machine Institute of the State Academy of Sciences has developed a 15-hp hybrid tractor in keeping with the trend
In November 2024, the respected Comrade Kim Jong Un visited regional-industry factories under construction in Songchon County in
February 06, 2026
In November 2024, the respected Comrade Kim Jong Un visited regional-industry factories under construction in Songchon County in
The Hydraulic Engineering Institute of the State Academy of Sciences has established a new technical process of model experiment
February 06, 2026
The Hydraulic Engineering Institute of the State Academy of Sciences has established a new technical process of model experiment
New public and production buildings have appeared at the Taechong Farm in Unpha County, North Hwanghae Province of the DPRK, thus
February 06, 2026
New public and production buildings have appeared at the Taechong Farm in Unpha County, North Hwanghae Province of the DPRK, thus
DPRK players returned home after taking part in the 2026 International Freestyle Wrestling Tournament “Ivan Yarygin Cup” held
February 06, 2026
DPRK players returned home after taking part in the 2026 International Freestyle Wrestling Tournament “Ivan Yarygin Cup” held
The 2026 National Winter Games opened with due ceremony at the ice hockey gymnasium of the Paektusan area sports village in
February 06, 2026
The 2026 National Winter Games opened with due ceremony at the ice hockey gymnasium of the Paektusan area sports village in
Construction projects for 2026 for the regional development policy began with due ceremonies in the area of the Sinuiju Combined
February 05, 2026
Construction projects for 2026 for the regional development policy began with due ceremonies in the area of the Sinuiju Combined
A booth drew unusual attention at the advanced science and technology and products exhibition-2025. At the event, the high-tech pr
February 05, 2026
A booth drew unusual attention at the advanced science and technology and products exhibition-2025. At the event, the high-tech pr
A research team of the Earth Science and Technology Faculty of Kim Chaek University of Technology has developed an outdoor gamma
February 05, 2026
A research team of the Earth Science and Technology Faculty of Kim Chaek University of Technology has developed an outdoor gamma
The astronomical chart carved on a stone was made between the late 5th century and the early 6th century in the period of Koguryo
February 05, 2026
The astronomical chart carved on a stone was made between the late 5th century and the early 6th century in the period of Koguryo
Modern houses have been built at the Kayang Farm in Unnyul County of South Hwanghae Province and the Kyejong Farm in Kumchon
February 04, 2026
Modern houses have been built at the Kayang Farm in Unnyul County of South Hwanghae Province and the Kyejong Farm in Kumchon
A national photo exhibition, “Under the uplifted banner of self-reliance”, opened to celebrate the 84th birth anniversary of
February 04, 2026
A national photo exhibition, “Under the uplifted banner of self-reliance”, opened to celebrate the 84th birth anniversary of
One day in August 2024, the respected Comrade Kim Jong Un visited a flood-hit area in North Phyongan Province. That day he told
February 04, 2026
One day in August 2024, the respected Comrade Kim Jong Un visited a flood-hit area in North Phyongan Province. That day he told
More Articles
