meta-openwrt:
fatal: 无法访问 'https://github.com/kraj/meta-openwrt/'：Failed to connect to github.com port 443: Connection timed out
error: Cannot fetch meta-openwrt from git://github.com/kraj/meta-openwrt
Fetching: 100% (11/11), done in 4m59.862s
Garbage collecting: 100% (11/11), done in 0.079s
Fetching: 33% (1/3) meta-clang
fatal: 无法访问 'https://github.com/openembedded/meta-openembedded/'：Empty reply from server

Please help me how can I figure this probelm, thank you!!!