Services provided by lawyers of claims and debts include: investigations on the debtor’s ability to repay and property clues; providing the creditor with a disposal method of his/her obligatory right and a plan to chase up debts; issuing a lawyer’s letter regarding the payment with the creditor’s authorization; filing a lawsuit against the debtor with the creditor’s authorization; applying for preservation measure to freeze the opposite side’s property. Contract dispute lawyers provide the following services: drafting and modification of various kinds of contracts; analysis of advantages and disadvantages of contract disputes; issuance of lawyer’s letter and fixed evidence; litigation; application for preservation measure to freeze the opposite side’s property. Types of contracts include: sales contract, contract of gift, loan contract, lease contract, contract for financial lease, contract for work, contract for construction projects, transportation contract, technical contract, contract of custody, warehousing contract, commission contract, brokerage contract and intermediary contract.