Gēnjù yízhǔ, tā shì zhè bǐ cáichǎn de wéiyī shòuyìrén.
Under the will, he is the sole beneficiary of the estate.
Tips
usage
An insurance contract has three roles: the 投保人 who buys the policy and pays, the 被保险人 whose life or property is covered, and the 受益人 who receives the payout. For someone who benefits from a policy or a change in general, 受益者 is more usual.