The literal combination “open black” can be confusing. The term originates from early gaming culture, particularly from
LAN cafes (网吧, wǎngbā). The “黑” refers to a “black room” (黑屋, hēiwū) or a dishonest shop (黑店, hēidiàn). In gaming, this evolved to mean a private lobby or voice chat where a pre-made team could coordinate secretly, hidden from their random teammates or opponents. Therefore, “开黑” means to “initiate a private team session.”