bilateral ties
... that in a major improvement in bilateral ties since it blocked Bangladesh's entry in the U.N. in 1972, China offered to help Bangladesh construct its first nuclear plant?
... that in a major improvement in <b id="mwAVI"><a class="mw-redirect" href="./Sino-Bangladeshi_relations" id="mwAVM" rel="mw:WikiLink" title="Sino-Bangladeshi relations">bilateral ties</a></b> since it blocked <a href="./Bangladesh" id="mwAVQ" rel="mw:WikiLink" title="Bangladesh">Bangladesh</a>'s entry in the <a class="mw-redirect" href="./U.N." id="mwAVU" rel="mw:WikiLink" title="U.N.">U.N.</a> in 1972, <a class="mw-redirect" href="./People's_Republic_of_China" id="mwAVY" rel="mw:WikiLink" title="People's Republic of China">China</a> offered to help Bangladesh construct its first <a href="./Nuclear_power_plant" id="mwAVc" rel="mw:WikiLink" title="Nuclear power plant">nuclear plant</a>?