从他们口中得知当年知青在时，各连队为了取暖、做饭，北林子、西林子、南林子三片原始次生林基本砍得差不多了，现在已经没有了。
O B-Person I-Person O O O O B-Time I-Time B-Person I-Person O O O O B-Organization I-Organization O O O O O O B-Thing O B-Location I-Location I-Location O B-Location I-Location I-Location O B-Location I-Location I-Location O O B-Location I-Location I-Location I-Location I-Location O O O O O O O O O B-Time I-Time O O O O O O