Luoyang Episode 12

Bali Hong Yi investigates the copper mine on his own and is attacked. He gets saved by Gao Bing Zhu. They find out there is an arsenal and Bali Hong Yi wants to alert the authorities. But they don't trust the authorities and they don't want the authorities to blame everyone there and kill everyone. Gao Bing Zhu knocks out and ties up Bali Hong Yi so he doesn't tell the authorities. Gao Bing Zhu's friend tries to talk him out of it, but turns out to be the traitor. Wu Si Yue looks for Yuan Fei. Song Liang is the culprit and wants Gao Bing Zhu join the Divine. He plans on killing the Interior Guard leader and killing the empress. Gao Bing Zhu agrees to join if he gets the killer who killed his friends. The copper is used to make superior weapons. Wu Si Yue comes to save Gao Bing Zhu. Gao Bing Zhu planned everything and told Bali Hong Yi to get help. The masked killer appears. Bali Hong Yi sets up a contraption to attack the enemy. They catch Song Liang and Bali Hong Yi prevents him from committing suicide. (Source: jindreame at MyDramaList)