diff --git a/Ubiquitous/XiZi_AIoT/services/app/Makefile b/Ubiquitous/XiZi_AIoT/services/app/Makefile
index 9873a4c29..9c10dc508 100644
--- a/Ubiquitous/XiZi_AIoT/services/app/Makefile
+++ b/Ubiquitous/XiZi_AIoT/services/app/Makefile
@@ -22,11 +22,12 @@ INC_DIR = 	-I$(KERNEL_ROOT)/services/shell/letter-shell \
 			-I$(KERNEL_ROOT)/services/lib/serial \
 			-I$(KERNEL_ROOT)/services/lib/usyscall \
 			-I$(KERNEL_ROOT)/services/fs/libfs \
+			-I$(KERNEL_ROOT)/services/net/libnet \
 			-I$(KERNEL_ROOT)/services/boards/$(BOARD) \
 			-I$(KERNEL_ROOT)/services/app 
 
 ifeq ($(BOARD), imx6q-sabrelite)
-all: init test_fs simple_client simple_server shell fs_server test_irq_hdlr test_irq_block test_irq_send eth_driver epit_server readme.txt lwip | bin
+all: init test_fs simple_client simple_server shell fs_server test_irq_hdlr test_irq_block test_irq_send eth_driver epit_server readme.txt test_net lwip | bin
 else 
 all: init test_fs simple_client simple_server shell fs_server test_irq_hdlr readme.txt | bin
 endif
@@ -88,6 +89,10 @@ test_priority: test_priority.o libserial.o printf.o usyscall.o arch_usyscall.o l
 	@${ld} ${user_ldflags} -e main -o $@ $^ ${board_specs}
 	@${objdump} -S $@ > $@.asm
 
+test_net:test_fs.o lwip_service.o libipc.o session.o libserial.o printf.o usyscall.o arch_usyscall.o libmem.o
+	@${ld} ${user_ldflags} -e main -o $@ $^ ${board_specs}
+	@${objdump} -S $@ > $@.asm
+
 %.o: %.c
 	@${cc} ${cflags} ${c_useropts} ${INC_DIR} -o $@ -c $< 
 
diff --git a/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h b/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
index 8fd07762b..1bf3966bb 100644
--- a/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
+++ b/Ubiquitous/XiZi_AIoT/services/fs/fs_server/include/block_io.h
@@ -18,7 +18,7 @@
 
 // Block size
 #define BLOCK_SIZE 512
-#define NR_BIT_BLOCKS 2
+#define NR_BIT_BLOCKS 4
 
 // bits size
 #define BITS 8
diff --git a/Ubiquitous/XiZi_AIoT/services/net/libnet/Makefile b/Ubiquitous/XiZi_AIoT/services/net/libnet/Makefile
index b676efc52..513229930 100644
--- a/Ubiquitous/XiZi_AIoT/services/net/libnet/Makefile
+++ b/Ubiquitous/XiZi_AIoT/services/net/libnet/Makefile
@@ -24,7 +24,7 @@ INC_DIR = 	-I$(KERNEL_ROOT)/services/net/libnet \
 			-I$(KERNEL_ROOT)/services/app
 
 net_server: lwip_service.o
-	@mv $^ $(KERNEL_ROOT)/services/net/net_server
+	@mv $^ $(KERNEL_ROOT)/services/app
 
 %.o: %.c
 	@echo "cc $^"
diff --git a/Ubiquitous/XiZi_AIoT/services/net/net_server/Makefile b/Ubiquitous/XiZi_AIoT/services/net/net_server/Makefile
index 24687b1bb..767bc31ef 100644
--- a/Ubiquitous/XiZi_AIoT/services/net/net_server/Makefile
+++ b/Ubiquitous/XiZi_AIoT/services/net/net_server/Makefile
@@ -54,8 +54,7 @@ session = $(KERNEL_ROOT)/services/app/session.o
 libipc = $(KERNEL_ROOT)/services/app/libipc.o
 
 lwip: COMPILER lwip_server.o | bin
-	@${ld} ${user_ldflags} -e main -o $@ ${api} ${core} ${ipv4} ${netif} lwip_service.o lwip_server.o \
-		${board_specs} ${libserial} ${printf} ${libmem} ${usyscall} ${arch_usyscall} ${session} ${libipc}
+	@${ld} ${user_ldflags} -e main -o $@ ${api} ${core} ${ipv4} ${netif} lwip_server.o ${libserial} ${printf} ${libmem} ${usyscall} ${arch_usyscall} ${session} ${libipc} ${board_specs}
 	@${objdump} -S $@ > $@.asm
 	@mv *.o bin
 	@mv $@ $(KERNEL_ROOT)/services/app
diff --git a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
index b7d299bb9..17fa8adab 100755
--- a/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
+++ b/Ubiquitous/XiZi_AIoT/services/tools/mkfs/mkfs.h
@@ -49,7 +49,7 @@ Modification:
 #define ROOT_INUM 1 // root inode number
 #define BLOCK_SIZE 512 // block size
 #define NR_BIT_PER_BYTE 8
-#define NR_BIT_BLOCKS 2
+#define NR_BIT_BLOCKS 4
 #define nr_blocks_total (BLOCK_SIZE * NR_BIT_PER_BYTE * NR_BIT_BLOCKS) // total number of blocks (including used blocks and free blocks)
 #define nr_inodes 200 // total number of inodes