Hertha responded well but both Dodi Lukebakio and Matheus Cunha squandered promising opportunities.
Viera bagged his second with a stunning free kick in the 56th minute, before Cedric Bakambu added the fifth in the 85th minute.
Adrian scored his second and third in the 72nd minute and in stoppage time respectively, helping Chongqing to seal the victory.
Potential successors for Wagner don't seem to be queuing up at the outfit's headquarters, but there may well be a new coach installed if the run of defeats continues.
America de Cali forward Aldair Rodriguez, Deportivo Municipal midfielder David Dioses and Cesar Vallejo midfielder Raziel Garcia were named on a 30-man list that is expected to be pruned in the coming days.
With the win, Chongqing pocketed five straight wins to rank third with 21 points, while Shijiazhuang dropped to the fifth with 17 points, four points behind the fourth-placed Hebei China Fortune, and had no chance to enter the top four with only one game left in the division. Enditem
Stage One involves 32 groups of four players, with the player who tops each group progressing to Stage Two.
"We will be announcing a new rival on the same date as soon as possible," the entity said in a separate statement.
Villarreal kicked off the season with a win and a draw, but strikers Gerard Moreno and former Barca frontman, Paco Alcacer have already shown they can trouble and defense in La Liga.
DALIAN, China, Sept. 24 (Xinhua) -- Jiangsu Suning stunned defending champion Guangzhou Evergrande 2-1, while Shandong Luneng beat Henan Jianye 2-0 in the 13th round of the Chinese Super League (CSL) here on Thursday.
CHANGSHA, Sept. 22 (Xinhua) -- The 2020 Changsha Wangcheng International Triathlon, an annual event originally scheduled for autumn, has been canceled due to COVID-19, according to the organizing committee on Tuesday.