Japan, Australia agree in principle to security agreement

Australia and Japan announced a Reciprocal Access Agreement to strengthen military ties amid rising Chinese assertiveness. The agreement allows for joint training and base sharing. This follows the signing of the Regional Comprehensive Economic Partnership, the world's largest trade bloc. Concerns were raised about the South and East China Seas, opposing militarization and unilateral changes. The Quad, comprising the US, Japan, Australia, and India, conducted naval exercises, signaling a strategic counter to China. The Quad Plus countries also held talks on the coronavirus pandemic.

What concerns did Suga and Morrison express in their joint statement?

How does Beijing perceive the Quad, and what does it signify?