Which us president traveled to china to begin a new era of better relations between the two countries

The US president who traveled to china to begin a new era of better relation between the two countries is RICHARD NIXON.
On February 12, 1972, President Richard Nixon traveled to China on an official visit. He was the first American president to visit China. The purpose of the visit was to improve American relation with China.

Magma is outside the volcano  and lava is inside the volcano.