As transliteration of 'Beauchamp',
博 (bó) renders the Bo-/Beau- vowel and
尚 (shàng) approximates the French nasalized '-champ'. As a Chinese place name (
博尚镇 in Yunnan), the characters carry their literal meaning:
博 'broad / abundant' +
尚 'esteem' — an auspicious place-name pairing.