What type of details about han hao can be gathered from the following bio? Bio: han hao , courtesy name yuansi , was a military general serving under the warlord cao cao in the late eastern han dynasty . han formerly served under wang kuang , administrator of henei , but was persuaded into serving cao cao by xiahou dun . during han 's service , he was one of the major contributors to the tuntian policy used by cao cao , which greatly improved military food supplies . chen shou , author of '' records of three kingdoms '' , commented that han was a courageous and loyal man who remained collected in any situation .
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