It's a skin which Chinese Airforce has adopted during WW2 and Chinese civil war.
During WW2, United Sdates had provide a mont of P-51 to China for against Japan. Many of them were served in both side of China during the Chinese civil war right after WW2. This skin was adopted by Republic of China(Nationalist China) Airforce during WW2 and Chinese civil war.
Installation: Extract into P-51D or TF-51D folder which is under Liveries folder in Bazer folder that you can find in the DCS main folder.
安裝：請解壓縮至DCS主資料夾下的Bazer資料夾下的Liveries中的P-51D 或 TF-51D資料夾。