diff --git a/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/boundary_condition_reference.hypara b/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/boundary_condition_reference.hypara
index 0c03383..21a9e85 100644
--- a/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/boundary_condition_reference.hypara
+++ b/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/boundary_condition_reference.hypara
@@ -1,4 +1,4 @@
-# nBoundaryConditons : Number of global boundary conditions.
+# nBoundaryConditions: Number of global boundary conditions.
 # bcName             : Boundary condition name.
 # bcType(in PHengLEI): Boundary condition type.
 
@@ -44,7 +44,7 @@ string bcName = "inlet";
 {
   int bcType = 5;
   int inflowParaType = 5; 
-  double refDimensionalVelocity = 9.2;
+  double refDimensionalVelocity = 68.9;
   double refDimensionalPressure = 101325.0;
   string speciesName ="Air, CH4";
   double initMassFraction[2] = [1.0, 0.0];
@@ -53,7 +53,7 @@ string bcName = "jet";
 {
   int bcType = 5;
   int inflowParaType = 5; 
-  double refDimensionalVelocity = 68.9;
+  double refDimensionalVelocity = 340.5;
   double refDimensionalPressure = 101325.0;
   string speciesName ="Air, CH4";
   double initMassFraction[2] = [0.0, 1.0];
@@ -63,7 +63,7 @@ string bcName = "outlet";
   int bcType = 6;
 }
 
-# 'bcType' is defined as following:        
+# 'bcType' is defined as following:
 #    -2: WAKE                      
 #    -1: INTERFACE                 
 #    0 : NO_BOUNDARY_CONDITION     
diff --git a/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/cfd_para_subsonic.hypara b/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/cfd_para_subsonic.hypara
index df478ff..b000b89 100644
--- a/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/cfd_para_subsonic.hypara
+++ b/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/bin/cfd_para_subsonic.hypara
@@ -7,7 +7,7 @@
 // intervalStepForce: The step intervals for aerodynamics coefficients file 'aircoef.dat' saved.
 // intervalStepRes: The step intervals for residual 'res.dat' saved.
 
-int maxSimuStep       = 50000;
+int maxSimuStep       = 30000;
 int intervalStepFlow  = 1000;
 int intervalStepPlot  = 1000;
 int intervalStepForce = 100;
diff --git a/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/二维非结构管道喷流气体混合算例说明文档.pdf b/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/二维非结构管道喷流气体混合算例说明文档.pdf
index b537c3c..f84da93 100644
Binary files a/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/二维非结构管道喷流气体混合算例说明文档.pdf and b/G07_TwoD_Pipe_Air-CH4_Mixing-Unstruct_1CPU/二维非结构管道喷流气体混合算例说明文档.pdf differ