ERROR:  
ERROR: package name '888' is illegal and cannot be used in message generation.
Please see http://ros.org/wiki/Names
make[2]: *** [888/CMakeFiles/888_generate_messages_py.dir/build.make:63：/home/xinyin/777_ws/devel/lib/python3/dist-packages/888/msg/_person.py] 错误 2
make[1]: *** [CMakeFiles/Makefile2:480：888/CMakeFiles/888_generate_messages_py.dir/all] 错误 2
make[1]: *** 正在等待未完成的任务....
/home/xinyin/777_ws/src/888/src/person.cpp:3:10: fatal error: learning_topic/Person.h: 没有那个文件或目录
    3 | #include "learning_topic/Person.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [888/CMakeFiles/person.dir/build.make:63：888/CMakeFiles/person.dir/src/person.cpp.o] 错误 1
make[1]: *** [CMakeFiles/Makefile2:1379：888/CMakeFiles/person.dir/all] 错误 2
make: *** [Makefile:141：all] 错误 2
Invoking "make -j2 -l2" failed