poverty-stricken country rich, so he opened its borders to trade and saw peaceful coexistence with the west. >> dong xiaoping came up with a theory he called hide your strength and bide your time. just steadily invest in the chinese economy and just ease your way in to the international system. >> the first peacekeeping engineering unit. >> china funded the u.n. and provided humanitarian aid, a remarkable turnaround from the days of mao. >> the chinese communist party is about to announce a new leader. >> but when xi jinping took power in 2012 -- >> what can china and the world expect from the leadership of xi jinping? >> -- the time for hiding strength and biding time was over.