Evergrande had a good opportunity just four minutes into the game but Ai Kesen hit chance off target.
He came back from the injury at the beginning of the year, but following the outbreak of coronavirus, his return was postponed by a few months.
When the safety car pulled in on lap 7, Valtteri Bottas, who had overtaken teammate Hamilton to lead after the first start, unusually elected to bunch the pack up until after he had crossed the start-finish line.
Bremen piled on the pressure and should have doubled their lead in the 52nd minute when Chong missed the target just wide.
So far the only new arrival at Anfield is Kostas Tsimikas, who should provide cover for Andy Robertson at left back, but with plenty of time before the transfer window closes, the club is expected to sign Thiago Alcantara from Bayern Munich to give further options to an already impressive midfield.
Tuchel's side dominated possession, 78.1% to Lens' 21.9%, but failed to create good chances as they recorded just one shot on target during the game.
Huanghai did not cut the deficit until the 85th minute. Thanks to Wang Wei's assist from the left side of the box, Romain Alessandrini pulled one back with a bicycle kick. Enditem
The "Green-Whites" lacked in ideas to overcome Jena's well-positioned defence as only Davie Selke came close after unleashing a dangerous effort from a sharp angle two minutes before the break.
Leeds will feel unlucky to lose to a late penalty, but showed they should have enough to survive with ease in the Premier League.
After being affected by the postponed 2020 Tokyo Olympic Games, the organizing committee of China's major sports event finally released the date of the 14th National Games opening ceremony officially.
Meanwhile the arrival of the experienced Manuel Pellegrini at Betis promises the stability that has been missing at the club in recent seasons and that alone should improve a team that underperformed last time around.