Answer:
The two strategies used before Nixon went to China were the "Ping-Pong Diplomacy" and the "Back-Channel Diplomacy". The "Ping-Pong Diplomacy" was a strategy of using sports as a way to improve relations between the two countries. The "Back-Channel Diplomacy" was a strategy of using secret negotiations to improve relations between the two countries. Both strategies helped to create a more open dialogue between the two countries and allowed for the eventual visit of President Nixon to China.