This week saw Koeman's men beat Girona 3-1 in another preparation game, but Saturday will be their last chance to get things right before things are for real next week.
It also looks as if last summer's major signing Luka Jovic could be heading out on loan, with Borja Mayoral instead being given the chance to provide back-up for striker Karim Benzema.
Shenzhen captain Gao Lin put the game to bed on 28 minutes when he scored from a tight angle after Preciado's header parried by Jianye keeper Wang Guoming.
While professional football depends to a much lower extent on ticket sales, other sports view the decision only as a first step. Ice-hockey, handball and basketball require bigger crowds to cover their costs.
"We face the world's best team, and you can say it is one of the hardest games you can start with. But still, it's a game, and this gives you the chance to achieve some points," the striker told Xinhua in an interview.
The circle-like emblem "Tai He" stands for universal peace and harmony, showcasing the ancient Chinese philosophy of appreciating the beauty of all civilizations. The mascot "An An" is a terracotta girl of China's Tang Dynasty (618 A.D- 907 A.D) playing polo, demonstrating the optimism and perseverance of persons with disabilities.
In stoppage time, Zhang Chengdong's right-footed volley enabled Hebei to cut the deficit to 3-2.
Elsewhere, Estudiantes beat Alianza Lima 3-2 and Caracas won 3-2 at Independiente Medellin. Enditem
"We've taken note of all of his personal and technical characteristics as well as watching him play," Tite told a virtual news conference. "He is a new emerging talent in an important position," he added.
Considering that the Bundesliga's curtain-raiser between treble-winning Bayern Munich against FC Schalke may still be played behind closed doors as the city of Munich is reporting a rate of over 40.
Elsewhere, fourth division Rot-Weiss Essen caused a surprise by knocking out newly-promoted Bundesliga side Arminia Bielefeld thanks to a first-half goal from Simon Engelmann. Enditem