Talk:GB 2312

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"The value of the first byte is from 0xA1-0xF7 (161-247), while the value of the second byte is from 0xA1-0xFE (161-254). Hence, like UTF-8, it is possible to check if a byte is part of a two-byte construct when using EUC-CN."

These two sentences don't make sense to me. How does the second sentence follow from the first?