In a game that was essentially decided in the first half, striker Mary raced to receive a ball in the box and scored to give Shenzhen a lead in the 4th minute.
"Hopefully now I can get some match fitness, get underway and really help the team to win trophies."
The prolific Norwegian striker had another chance later but defender Nico Elvedi blocked his effort.
The two sides meet again on the same ground on Thursday.
Martinez will probably name the same starting 11 in Albania, with Roberto Soldado leading the attack and wingers Darwin Machis and Antonio Puertas providing pace on the break in front of a midfield consisting of new signing Luis Milla, Yangel Herrera and Angel Montoro.
The first half started slowly, but things quickly changed when Argentina's Gonzalo Martinez sent an indirect free-kick with surgical accuracy onto the head of Hamdallah, the Moroccan making no mistake from six yards to put his team ahead at the half-hour mark.
Feng Zhiqiang and Mo Jiadie came first in the men's and women's 400m hurdles. Xu Shuangshuang won women's 5,000m. In field events, Luo Na won women's hammer throw with 69.19m, while Wu Ruiting ranked first in the men's triple jump. Enditem
Fans can't wait for Erling Haaland, Jude Bellingham, Jadon Sancho, Real loanee Reinier, Giovanni Reyna and wonderboy Youssoufa Moukoko to get the engine running at full speed.
While Bayern confirmed Thiago Alcantara's departure (the Spaniard is joining Liverpool for 24 million euros) the Bayern coach is facing a campaign that started with an incomplete squad.
However, the return of Zinedine Zidane saw Marcelo return to favor and the signing of Ferland Mendy in 2019 saw Reguilon loaned to Sevilla (who are now coached by former Madrid boss Julen Lopetegui), where he played 38 times and scored three goals as Sevilla finished fourth in La Liga and won the Europa League for the sixth time in the club's history.
Polish midfielder Adrian Mierzejewski scored Chongqing's third goal in the 71st minute, helping Chongqing to clinch a 3-0 victory over Qingdao.