Mao uses "diamond anvils" to compress materials under super-high pressure conditions (3.6 million atmospheres) like those found inside the earth, to observe how the various materials change in the high-pressure world.
毛河光利用鑽石做「高壓砧」，以等同於地心的超高壓力（360 萬大氣壓）加諸其上，藉此來觀察高壓世界裡的各種物質變化。