KATHMANDU, Sept 10: While Challenging Sajha Party leader Rabindra Mishra, who was narrowly defeated by him in the previous parliamentary election from Kathmandu, to make his party sustainable, Nepali Congress (NC) leader Prakash Man Singh has said that opening a party is not like opening a shop. Leader Singh also said that it is not possible for those who cannot sustain the party even for two years to develop the country.