【盛筵难再】〖shèng yán nán zài〗[difficult to have such a grand feast again; Good times are hard to come by; Grand gatherings do not take place every day; It is very rare for sb. to attend such a great banquet]

盛行于世诵诗典，

筵宴亲朋传美谈。

难遇难逢志同友，

再接再厉宏图展。

比喻良机不易重逢。Metaphor good opportunity not easy meet again.同：盛筵必散。