Pull rtmp video in nginx server

Question

I have some question about nginx server. Current I have a live 247 RTMP Stream demo URL, now I want pull this link in nginx server. My config:

worker_processes 1;
events {
    worker_connections 1024;
}

# RTMP configuration
rtmp {
    server {
        listen 1935;
        chunk_size 4000;
        application mypull {
            live on ;
            meta copy;
            allow play all;
            pull rtmp://62.113.210.250/medienasa-live/rbw_high name=channel1 live=1;
        }
        application stream {
            live on;
            hls on;
            hls_path /tmp/hls;
            hls_fragment 3;
            hls_playlist_length 60;
        }
    }
}

http {
    server {
        listen 8080;
        location /hls {
            alias /tmp/hls;
        }
    }
}

But nothing pulls into /tmp/hls. I try using ffmpeg to convert this URL to stream.m3u8, but nginx does not play my stream.m3u8 too. Please help me know what is wrong?