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diff --git a/info/asymptote-faq-zh-cn/src/figures/6-11a.asy b/info/asymptote-faq-zh-cn/src/figures/6-11a.asy
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+++ b/info/asymptote-faq-zh-cn/src/figures/6-11a.asy
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+import graph;
+
+size(200,200,IgnoreAspect);
+
+real factorial(real t) {return gamma(t+1);}
+
+scale(Linear,Log);
+
+// Graph the factorial function.
+draw(graph(factorial,0,10));
+
+// Method 1: Draw nodes, but hide line
+pair F(int t) {return (t,factorial(t));}
+// Graph of factorial function from 0 to 10
+pair[] z=sequence(F,11);
+draw(graph(z),invisible,marker(scale(0.8mm)*unitcircle,blue,Fill,above=true));
+
+// Method 2: Nongraphing routines require explicit scaling:
+//pair dotloc(int t) {return Scale(F(t));}
+//pair[] dotlocs=sequence(dotloc,11);
+//dot(dotlocs);
+
+xaxis("$x$",BottomTop,LeftTicks);
+yaxis("$y$",LeftRight,RightTicks);
+