In Chapter 6 of the Antigravitation Engine Site, the symmetry breaking in vacuum is studied as follows. 11. The symmetry breaking in vacuum It can be known from Section 8 of this chapter that everywhere in vacuum there are non-present-time foggoids, whose gfm ball particles have a dominant rotation direction because of the effect of the inertial frame dragging (see Chapter 2, Section 2) of the rotating gfm ball of the foggoid of the large-scale structure of the universe. Hence there exists the symmetry breaking in vacuum. For more information, please see the Antigravitation Engine Site (URL: http://xczhx.nease.net/indexEnglish.htm).