North Korea’s leader Kim Jong Un admitted the country’s economic development plan had fallen short in “almost all areas” as he opened a rare congress of the ruling Workers’ Party, state media reported Wednesday. The gathering is the first of its kind in five years, only the eighth in the nuclear-armed country’s history, and comes weeks before US President-elect Joe Biden takes office. Relations with Washington have been deadlocked since talks between Kim and President Donald Trump stalled over sanctions relief and what Pyongyang would be willing to give up in return. At the same time the North is more isolated than ever after closing its borders last January to protect itself against the coronavirus that first emerged in neighbour and key ally China. The congress opened on Tuesday in the capital, the official Korean Central News Agency (KCNA) reported. Pictures in the Rodong Sinmum ruling party newspaper showed 7,000 delegates and attendees packed into the cavernous hall, none of them wearing masks. On the first day of his work review, Kim said the results of the last five-year economic development strategy “fell extremely short of our goals in almost all areas”, KCNA reported. The plan was quietly scrapped ahead of schedule last year. “We intend to comprehensively analyse in depth… our experiences, lessons and the errors committed,” added Kim, who wore a black suit and a lapel badge of his father and grandfather. KCNA’s transcript did not specify any of the mistakes, and gave no indication Kim mentioned either Washington or Seoul in his speech, which is expected to continue Wednesday. The coronavirus pandemic has added to the pressures on the North, with Pyongyang blockading itself far more effectively than even the most hawkish backer of sanctions could ever hope to achieve. Trade with key ally China is at a tiny fraction of the usual level, while many foreign embassies have closed or drastically reduced their representations. Pyongyang insists that it has not had a single case of the disease — observers doubt the claim — but summer floods put further strain on its finances. Analysts say the congress will largely focus on domestic issues, reaffirming the importance of “self-reliance” and proclaiming a new economic plan.