diff --git a/rknn-toolkit-lite2-v1.2.0/doc/Rockchip_User_Guide_RKNN_Toolkit_Lite2_V1.2.0_CN.pdf b/rknn-toolkit-lite2-v1.2.0/doc/Rockchip_User_Guide_RKNN_Toolkit_Lite2_V1.2.0_CN.pdf
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diff --git a/rknn-toolkit-lite2-v1.2.0/doc/Rockchip_User_Guide_RKNN_Toolkit_Lite2_V1.2.0_EN.pdf b/rknn-toolkit-lite2-v1.2.0/doc/Rockchip_User_Guide_RKNN_Toolkit_Lite2_V1.2.0_EN.pdf
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diff --git a/rknn-toolkit-lite2-v1.2.0/doc/change_log.txt b/rknn-toolkit-lite2-v1.2.0/doc/change_log.txt
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+2022-01-14
+版本：v1.2.0
+1. 新功能：
+   1.1 RKNN模型推理；
+   1.2 SDK版本查询；
+   1.3 模型可运行平台查询。
\ No newline at end of file
diff --git a/rknn-toolkit-lite2-v1.2.0/examples/inference_with_lite/resnet18_for_rk356x.rknn b/rknn-toolkit-lite2-v1.2.0/examples/inference_with_lite/resnet18_for_rk356x.rknn
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diff --git a/rknn-toolkit-lite2-v1.2.0/examples/inference_with_lite/space_shuttle_224.jpg b/rknn-toolkit-lite2-v1.2.0/examples/inference_with_lite/space_shuttle_224.jpg
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diff --git a/rknn-toolkit-lite2-v1.2.0/examples/inference_with_lite/test.py b/rknn-toolkit-lite2-v1.2.0/examples/inference_with_lite/test.py
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+import platform
+import cv2
+import numpy as np
+import platform
+from rknnlite.api import RKNNLite
+
+# decice tree for rk356x/rk3588
+DEVICE_COMPATIBLE_NODE = '/proc/device-tree/compatible'
+
+def get_host():
+    # get platform and device type
+    system = platform.system()
+    machine = platform.machine()
+    os_machine = system + '-' + machine
+    if os_machine == 'Linux-aarch64':
+        try:
+            with open(DEVICE_COMPATIBLE_NODE) as f:
+                device_compatible_str = f.read()
+                if 'rk3588' in device_compatible_str:
+                    host = 'RK3588'
+                else:
+                    host = 'RK356x'
+        except IOError:
+            print('Read device node {} failed.'.format(DEVICE_COMPATIBLE_NODE))
+            exit(-1)
+    else:
+        host = os_machine
+    return host
+
+INPUT_SIZE = 224
+
+RK356X_RKNN_MODEL = 'resnet18_for_rk356x.rknn'
+RK3588_RKNN_MODEL = 'resnet18_for_rk3588.rknn'
+
+
+def show_top5(result):
+    output = result[0].reshape(-1)
+    # softmax
+    output = np.exp(output)/sum(np.exp(output))
+    output_sorted = sorted(output, reverse=True)
+    top5_str = 'resnet18\n-----TOP 5-----\n'
+    for i in range(5):
+        value = output_sorted[i]
+        index = np.where(output == value)
+        for j in range(len(index)):
+            if (i + j) >= 5:
+                break
+            if value > 0:
+                topi = '{}: {}\n'.format(index[j], value)
+            else:
+                topi = '-1: 0.0\n'
+            top5_str += topi
+    print(top5_str)
+
+
+if __name__ == '__main__':
+
+    host_name = get_host()
+    if host_name == 'RK356x':
+        rknn_model = RK356X_RKNN_MODEL
+    elif host_name == 'RK3588':
+        rknn_model = RK3588_RKNN_MODEL
+    else:
+        print("This demo cannot run on the current platform: {}".format(host_name))
+        exit(-1)
+
+    rknn_lite = RKNNLite()
+
+    # load RKNN model
+    print('--> Load RKNN model')
+    ret = rknn_lite.load_rknn(rknn_model)
+    if ret != 0:
+        print('Load RKNN model failed')
+        exit(ret)
+    print('done')
+
+    ori_img = cv2.imread('./space_shuttle_224.jpg')
+    img = cv2.cvtColor(ori_img, cv2.COLOR_BGR2RGB)
+
+    # init runtime environment
+    print('--> Init runtime environment')
+    # run on RK356x/RK3588 with Debian OS, do not need specify target.
+    if host_name == 'RK3588':
+        ret = rknn_lite.init_runtime(core_mask=RKNNLite.NPU_CORE_0)
+    else:
+        ret = rknn_lite.init_runtime()
+    if ret != 0:
+        print('Init runtime environment failed')
+        exit(ret)
+    print('done')
+
+    # Inference
+    print('--> Running model')
+    outputs = rknn_lite.inference(inputs=[img])
+    show_top5(outputs)
+    print('done')
+
+    rknn_lite.release()
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