Primary Function: Bala Book Text: Quad ndi bala lomwe lili mu nyumba ya mbiri yakale yopangidwa mu mawonekedwe a quadrangle pakati pa mzinda wa Beijing. Nyumba yoyambirira inali mu mkhalidwe wosatetezeka, zomwe zinapangitsa kuti kulimbitsa ndi kumangidwanso kukhale kovuta. Kukonzanso kumeneku kumawonjezera ntchito zamakono pomwe kukusunga mawonekedwe a dera lakale la mzindawu. Konkriti imagwiritsidwa ntchito pa khoma lakunja ndipo matabwa amagwiritsidwa ntchito pokongoletsa mkati. Kapangidwe kake kamalinganiza magawo atatu a zinthu zosiyana: chatsopano ndi chakale, chodekha ndi chapamwamba, malonda ndi mtendere. Zachinsinsi zimatetezedwa kuti bala lisakanikirane mwakachetechete ndi dera lozungulira la mbiri yakale.