The Great Wall finds Matt Damon and Pedro Pascal as European mercenaries who come to China in search of black powder.  They discover that the Great Wall was built, not as a defense against other people, but to protect the country from nasty monsters who attack every sixty years.  The special effects were excellent, and the visuals were impressive, but I  found the whole movie a little silly.  My apologies to Matt Damon, who I like as Jason Bourne,  but I felt he seemed too nice to be a mercenary.  Willem Defoe is also featured.  The movie was directed by the great Chinese director Yimou Zhang and I understand that it was his first English-language production and the largest film shot entirely in China.  I would be willing to give Zhang another try because the scope and breadth of the scenery was pretty amazing.  I just hope that next time he has a better script and  a main character portrayed by a more credible actor for that sort of role.