Joint railroad police emergency drill held at freight hub in Nanjing(1/11)

Bomb disposal team members exchange information as they handle "explosive" device detected during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

A police officer confronts a "criminal" during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

A bomb disposal team member detects "explosive" during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

Police officers take part in a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

Police officers bring a "criminal" under control during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

A bomb disposal team member detects "explosive" during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

Police officers bring a "criminal" under control during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

Police officers bring a "criminal" under control during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

A bomb disposal team member detects "explosive" during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

A bomb disposal team member handles "explosive" during a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)

Police officers take part in a joint railroad police emergency drill at a freight hub in Nanjing, east China's Jiangsu Province, Jan. 19, 2021. (Xinhua/Ji Chunpeng)