rt索引不能使用中文

[6api]

plain索引正常，rt索引中文不行 rt索引，不管 chinese_dictionary 是否打开，都无法搜索中文，结果为空，英文可以

index rt
{
    # chinese_dictionary    = /usr/local/sphinx/etc/xdict
    min_word_len    = 1
    ngram_len       = 1
    ngram_chars     = U+3000..U+2FA1F

    type            = rt
    path            = /usr/local/sphinx/var/data/rt
    rt_mem_limit    = 512M

    rt_field            = name
    rt_attr_uint        = cid
}

[eric1688]

charset_type = utf-8加上试试