Hoffenheim dominated possession and produced more promising chances but Horn was on guard to deny Kramaric and Pavel Kaderabek in the 18th minute.
The Gunners only finished eighth in the Premier League last season, but their FA Cup win secured them a place in the UEFA Europa League for the 2020-21 campaign. Enditem
Li Ang netted a right-sided free-kick on 74 minutes to put the game beyond doubt, with a sweet finish for Suning.
Angelo Preciado, Gabriel Torres, Jairo Sanchez, and Beder Caicedo piled further misery on their opponents with second-half goals.
"I intend to prove my qualities to my critics. This attitude helps me at Schalke get over tough times with my team," the 2015 Belgian champion said.
12 players are below the age of 23. Favre could count on the youngest squad in the club's history and play intense and fluid attacking football.
The 48-year-old coach started his career in 2009 as the head coach of Iranian Pas Hamedan and then headed Iran's national U-23 team, Naft Tehran, Esteghlal and Zob Ahan.
Ismael Al Hammadi (L) of Shabab Al Ahli vies for the ball with Ali Nemati of Shahr Khodrou during the AFC Asian Champions League group B football match between Shabab Al Ahli of United Arab Emirates and Shahr Khodrou of Iran at Al Janoub Stadium in Doha, Capital of Qatar, Sept. 17, 2020. (Photo by Nikku/Xinhua)
After suffering five defeats consecutively, Qingdao had no chance of being among the top eight in the next league session, although three games of the first session remain on the schedule.
Brazilian forward Alan Kardec was awarded a special jersey to commemorate his 100th CSL appearance in Chongqing before the match.
Many fans meanwhile hope Matthaeus is wrong and the new season is going to end after a fierce battle. Looking at the Blacks and Yellows unlimited pool of exceptional talents, coach Lucien Favre seems to be able to play a fluid and attacking football.