diff --git a/README.md b/README.md
index dd258af..b478ea7 100644
--- a/README.md
+++ b/README.md
@@ -3,12 +3,47 @@ Project 0 Getting Started
 
 **University of Pennsylvania, CIS 565: GPU Programming and Architecture, Project 0**
 
-* (TODO) YOUR NAME HERE
-  * (TODO) [LinkedIn](), [personal website](), [twitter](), etc.
-* Tested on: (TODO) Windows 22, i7-2222 @ 2.22GHz 22GB, GTX 222 222MB (Moore 2222 Lab)
+* Xuntong Liang
+  * [LinkedIn](https://www.linkedin.com/in/xuntong-liang-406429181/), [GitHub](https://github.com/PacosLelouch), [twitter](https://twitter.com/XTL90234545).
+* Tested on: Windows 10, i7-10750H @ 2.60GHz 16GB, RTX 2070 Super with Max-Q 8192MB
 
-### (TODO: Your README)
+### Part 3.1: CUDA
 
-Include screenshots, analysis, etc. (Remember, this is public, so don't put
-anything here that you don't want to share with the world.)
+CUDA running result:
+
+![CUDA Test](images/cuda.png)
+
+
+
+Analysis:
+
+![CUDA Analysis](images/cuda-analysis.png)
+
+This needs us to go to `Nsight` -> `Nsight Systems 2021.2.4` -> `Trace`. 
+
+Then in `NVIDIA Nsight Systems 2021.2.4 `, `Select target for profiling` -> `Start`. Make sure to fill in the correct `Command line with arguments` and `Working directory` in `Target application`, and check `Collect CUDA trace` and `Collect OpenGL trace`. 
+
+
+
+Debug with Nsight:
+
+![Debug with Nsight](images/cuda-debug.png)
+
+The `blockIdx` is (12, 0, 0) and the `threadIdx` is (8, 1, 0). The thread counts from the `Shader Info` are discontinuous, and the threads between these thread indices are shown in `Threads`. We need to calculate that which is (8, 1, 0). Since the `blockDim` is (16, 16, 1), threads represented by (x, 1, 0) should be in the third or fourth group of threads. Then we can count x = 8, and find the corresponding thread, which is the first thread of the fourth group of threads.
+
+
+
+### Part 3.2: WebGL
+
+Check WebGL support:
+
+![Check WebGL support](images/webgl2support.png)
+
+
+
+### Part 3.3: DXR
+
+DXR test, with color (0.2, 0.4, 0.8):
+
+![DXR Test](images/dxr.png)
 
diff --git a/cuda-getting-started/src/main.cpp b/cuda-getting-started/src/main.cpp
index 886fd4c..7dfd1b8 100644
--- a/cuda-getting-started/src/main.cpp
+++ b/cuda-getting-started/src/main.cpp
@@ -10,8 +10,8 @@
  * C main function.
  */
 int main(int argc, char* argv[]) {
-    // TODO: Change this line to use your name!
-    m_yourName = "TODO: YOUR NAME HERE";
+    // DONE: Change this line to use your name!
+    m_yourName = "Xuntong Liang";
 
     if (init(argc, argv)) {
         mainLoop();
diff --git a/dxr-support/src/D3D12RaytracingHelloWorld/D3D12RaytracingHelloWorld.cpp b/dxr-support/src/D3D12RaytracingHelloWorld/D3D12RaytracingHelloWorld.cpp
index 9e78c8f..e1c9476 100644
--- a/dxr-support/src/D3D12RaytracingHelloWorld/D3D12RaytracingHelloWorld.cpp
+++ b/dxr-support/src/D3D12RaytracingHelloWorld/D3D12RaytracingHelloWorld.cpp
@@ -60,6 +60,9 @@ void D3D12RaytracingHelloWorld::EnableDirectXRaytracing(IDXGIAdapter1* adapter)
 
 void D3D12RaytracingHelloWorld::OnInit()
 {
+    // Modify my adapter ID to get NVIDIA GPU.
+    m_adapterIDoverride = 1;
+
     m_deviceResources = std::make_unique<DeviceResources>(
         DXGI_FORMAT_R8G8B8A8_UNORM,
         DXGI_FORMAT_UNKNOWN,
diff --git a/dxr-support/src/D3D12RaytracingHelloWorld/Raytracing.hlsl b/dxr-support/src/D3D12RaytracingHelloWorld/Raytracing.hlsl
index d817ca4..7de1987 100644
--- a/dxr-support/src/D3D12RaytracingHelloWorld/Raytracing.hlsl
+++ b/dxr-support/src/D3D12RaytracingHelloWorld/Raytracing.hlsl
@@ -69,7 +69,8 @@ void MyRaygenShader()
 [shader("closesthit")]
 void MyClosestHitShader(inout RayPayload payload, in MyAttributes attr)
 {
-    float3 barycentrics = float3(1 - attr.barycentrics.x - attr.barycentrics.y, attr.barycentrics.x, attr.barycentrics.y);
+    // float3 barycentrics = float3(1 - attr.barycentrics.x - attr.barycentrics.y, attr.barycentrics.x, attr.barycentrics.y);
+    float3 barycentrics = float3(0.2, 0.4, 0.8);
     payload.color = float4(barycentrics, 1);
 }
 
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