The Taibai Empire tests the zhengtian's black fire cannon. Commander Meng Ji is satisfied by the results. Empress Cheng rewards Zhao for his achievement. However, though she is the empress, Empress Cheng is distraught over forcing her beloved Zhao to fight against his childhood friends. While worrying alone, she encounters Lady Pang's daughter Juan.
Meanwhile, upon hearing about the black fire cannon, Mo Heng realizes the Taibai Empire must have built the zhengtian. The rebels discuss plans to handle the zhengtian. Yin resolves to fight in order to see Ning and Zhao again.
But even the zhengtian has a weakness:
 the black fire reactor.
:لكن حتّى لـ سيتين نقطة ضعف
مُفاعل النار السوداء
Pero hasta el zhengtian
tiene una debilidad: el reactor.
Pero hasta el zhengtian
tiene una debilidad: el reactor.
Mais lui aussi a un point faible…
Ma anche lo Zhengtian ha un punto debole.
Mesmo o zhengtian tem uma
fraqueza, o reator de fogo negro.
Даже у «Чженьтяня» есть слабое место.
Реактор чёрного огня.