diff --git a/Ubiquitous/XiZi_IIoT/arch/risc-v/ch32v208rbt6/User/ch32v20x_it.c b/Ubiquitous/XiZi_IIoT/arch/risc-v/ch32v208rbt6/User/ch32v20x_it.c
index 7a161e5fd..bb3663c52 100644
--- a/Ubiquitous/XiZi_IIoT/arch/risc-v/ch32v208rbt6/User/ch32v20x_it.c
+++ b/Ubiquitous/XiZi_IIoT/arch/risc-v/ch32v208rbt6/User/ch32v20x_it.c
@@ -11,10 +11,15 @@
 *******************************************************************************/
 #include "ch32v20x_it.h"
 #include "board.h"
+#include "ch32v20x_exti.h"
+#include "ch32v20x_tim.h"
+#include "eth_driver.h"
 #include <xs_isr.h>
 
 void NMI_Handler(void) __attribute__((interrupt()));
 void HardFault_Handler(void) __attribute__((interrupt()));
+void ETH_IRQHandler(void) __attribute__((interrupt()));
+void TIM2_IRQHandler(void) __attribute__((interrupt()));
 
 /*********************************************************************
  * @fn      NMI_Handler
@@ -55,4 +60,43 @@ void HardFault_Handler(void)
     FREE_INT_SP();
 }
 
+/*********************************************************************
+ * @fn      ETH_IRQHandler
+ *
+ * @brief   This function handles ETH exception.
+ *
+ * @return  none
+ */
+void ETH_IRQHandler(void)
+{
+    WCHNET_ETHIsr();
+}
+
+/*********************************************************************
+ * @fn      TIM2_IRQHandler
+ *
+ * @brief   This function handles TIM2 exception.
+ *
+ * @return  none
+ */
+void TIM2_IRQHandler(void)
+{
+    // GET_INT_SP();
+    // /* enter interrupt */
+    // x_base level;
+    // level = DisableLocalInterrupt();
+    // isrManager.done->incCounter();
+    // EnableLocalInterrupt(level);
+    // WCHNET_TimeIsr(WCHNETTIMERPERIOD);
+    // TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
+    // /* leave interrupt */
+    // level = DisableLocalInterrupt();
+    // isrManager.done->decCounter();
+    // EnableLocalInterrupt(level);
+    // FREE_INT_SP();
+    // KPrintf("%s %s %d\n",   __FILE__, __FUNCTION__, __LINE__);
+    WCHNET_TimeIsr(WCHNETTIMERPERIOD);
+    TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
+}
+
 
diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c
index c8f27cb02..110a432b8 100644
--- a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c
+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/board.c
@@ -44,7 +44,7 @@ extern uint32_t SystemCoreClock;
 static uint32_t _SysTick_Config(uint32_t ticks)
 {
     // SystemCoreClockUpdate();
-    NVIC_SetPriority(SysTicK_IRQn, 1);
+    NVIC_SetPriority(SysTicK_IRQn, 0x01);
     NVIC_SetPriority(Software_IRQn, 0xf0);
     NVIC_EnableIRQ(SysTicK_IRQn);
     NVIC_EnableIRQ(Software_IRQn);
@@ -60,6 +60,7 @@ static uint32_t _SysTick_Config(uint32_t ticks)
  */
 void InitBoardHardware()
 {
+    Delay_Init();
     USART_Printf_Init(115200);
     /* System Tick Configuration */
     _SysTick_Config(SystemCoreClock / TICK_PER_SECOND);
@@ -68,19 +69,19 @@ void InitBoardHardware()
     InitHwUart();
     InstallConsole("uart1", SERIAL_DRV_NAME_1, SERIAL_1_DEVICE_NAME_0);
 #ifdef BSP_USING_ETH
-    // InitHwEth();
+    InitHwEth();
 #endif
     KPrintf("consle init completed.\n");
     KPrintf("board initialization......\n");
     // KPrintf("memory address range: [0x%08x - 0x%08x], size: %d\n", (x_ubase) MEMORY_START_ADDRESS, (x_ubase) MEMORY_END_ADDRESS, gd32vf103_SRAM_SIZE);
     KPrintf("memory address range: [0x%08x - 0x%08x] SRAM_SIZE: %d, ssize: %d\n", (x_ubase) MEMORY_START_ADDRESS, (x_ubase) MEMORY_END_ADDRESS, SRAM_SIZE, __stack_size);
     /* initialize memory system */
-    x_ubase dynamic_buddy_start = ALIGN_MEN_UP((x_ubase)MEMORY_START_ADDRESS, MM_PAGE_SIZE);
-    x_ubase dynamic_buddy_end = ALIGN_MEN_DOWN((x_ubase)MEMORY_END_ADDRESS, MM_PAGE_SIZE);
-    KPrintf("dynamic buddy address range: [0x%08x - 0x%08x]\n", dynamic_buddy_start, dynamic_buddy_end);
+    // x_ubase dynamic_buddy_start = ALIGN_MEN_UP((x_ubase)MEMORY_START_ADDRESS, MM_PAGE_SIZE);
+    // x_ubase dynamic_buddy_end = ALIGN_MEN_DOWN((x_ubase)MEMORY_END_ADDRESS, MM_PAGE_SIZE);
+    // KPrintf("dynamic buddy address range: [0x%08x - 0x%08x]\n", dynamic_buddy_start, dynamic_buddy_end);
     // memory address range: [0x20001440 - 0xcb0843e0]
     // dynamic buddy address range: [0x20002000 - 0xcb084000]
-    ShowMemory();
+    // ShowMemory();
     KPrintf("board init done.\n");
     KPrintf("start okernel...\n");
 }
diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/connect_ether.c b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/connect_ether.c
index 0ee5fd80a..cd810a63b 100644
--- a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/connect_ether.c
+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/connect_ether.c
@@ -240,13 +240,13 @@ uint8_t InitHwEth()
         KPrintf("version error.\n");
     }
 
-    // WCHNET_GetMacAddr(MACAddr); // get the chip MAC address
+    WCHNET_GetMacAddr(MACAddr); // get the chip MAC address
     KPrintf("mac addr:");
     for (i = 0; i < 6; i++)
         KPrintf("%x ", MACAddr[i]);
     KPrintf("\n");
 
-    // TIM2_Init();
+    TIM2_Init();
 
     i = ETH_LibInit(IPAddr, GWIPAddr, IPMask, MACAddr); // Ethernet library initialize
     mStopIfError(i);
@@ -263,7 +263,7 @@ uint8_t InitHwEth()
     }
 #endif
 
-//     memset(socket, 0xff, WCHNET_MAX_SOCKET_NUM);
+    memset(socket, 0xff, WCHNET_MAX_SOCKET_NUM);
 
     return i;
 }
diff --git a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/eth_driver.c b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/eth_driver.c
index c6e95a9f7..f0d3aa08e 100755
--- a/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/eth_driver.c
+++ b/Ubiquitous/XiZi_IIoT/board/ch32v208rbt6/third_party_driver/ethernet/eth_driver.c
@@ -702,7 +702,7 @@ void WCHNET_ETHIsr( void )
 void ETH_Init( uint8_t *macAddr )
 {
     ETH_LedConfiguration( );
-    Delay_Ms(100);
+    // Delay_Ms(100); // there is a bug: the Systick register didn't restore original state, causing systick interrupt failing. 
     ETH_Configuration( macAddr );
     ETH_DMATxDescChainInit(DMATxDscrTab, MACTxBuf, ETH_TXBUFNB);
     ETH_DMARxDescChainInit(DMARxDscrTab, MACRxBuf, ETH_RXBUFNB);