QT5 target_link_libraries can not find network library - qt5

Question

All,
I am trying change QT pro file to cmake ,and found a error.
got a error
CMake Error at CMakeLists.txt:60 (target_link_libraries):
Target "opencvTest" links to:
Qt5::network
but the target was not found.
here is CMakeLists.txt
`
cmake_minimum_required(VERSION 3.5)
project(opencvTest VERSION 0.1 LANGUAGES CXX)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} "I:/Qt515/5.15.2/mingw81_64/lib/cmake")
find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets network)
find_package(Qt5Network REQUIRED)
set(PROJECT_SOURCES
main.cpp
mainwindow.cpp
mainwindow.h
mainwindow.ui
)
if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
qt_add_executable(opencvTest
MANUAL_FINALIZATION
${PROJECT_SOURCES}
)
# Define target properties for Android with Qt 6 as:
# set_property(TARGET opencvTest APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
# ${CMAKE_CURRENT_SOURCE_DIR}/android)
# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
else()
if(ANDROID)
add_library(opencvTest SHARED
${PROJECT_SOURCES}
)
# Define properties for Android with Qt 5 after find_package() calls as:
# set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
else()
add_executable(opencvTest
${PROJECT_SOURCES}
)
endif()
endif()
set(OpenCV_DIR "${CMAKE_SOURCE_DIR}/../../b")
find_package(OpenCV REQUIRED)
message(STATUS "OpenCV library status:")
message(STATUS " version: ${OpenCV_VERSION}")
message(STATUS " libraries: ${OpenCV_LIBS}")
message(STATUS " include path: ${OpenCV_INCLUDE_DIRS}")
include_directories(${OpenCV_INCLUDE_DIRS})
target_link_libraries(opencvTest PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::network)
target_link_libraries(opencvTest PRIVATE ${OpenCV_LIBS})
set_target_properties(opencvTest PROPERTIES
MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
MACOSX_BUNDLE TRUE
WIN32_EXECUTABLE TRUE
)
install(TARGETS opencvTest
BUNDLE DESTINATION .
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
if(QT_VERSION_MAJOR EQUAL 6)
qt_finalize_executable(opencvTest)
endif()
`
win10 + QT 5.15.2 + mingw81_64
did I miss somethings?
if I replace Qt${QT_VERSION_MAJOR}::network to Qt${QT_VERSION_MAJOR}::Core or Gui , it works.
and also fail with Qt${QT_VERSION_MAJOR}::Multimedia.
If I remove Qt${QT_VERSION_MAJOR}::network, I will get a header file lost error.
fatal error: QCameraInfo: No such file or directory
#include <QCameraInfo>