南墙囡墙
[nán qiáng nān qiáng]
"Nanqiang Guanqiang" literally means 'the wall at the South end.' It may represent a sense of resistance or limit. In China, there's also a common idiom that says one hits a brick wall - a futile attempt or situation where efforts come to nothing. It may imply an obstacle or dead end that needs breaking through.