The appellant wrongly identified Chen Jian's identity because the company did not carefully examine the relevant contract contents during the performance of the futures brokerage contract, and his behavior was at fault. Therefore, it is not improper for the company to assume 10% supplementary compensation liability for Chen Jian's insufficient responsibility in the medium term. To sum up, the appellant's appeal grounds cannot be established, and the original judgment found that the facts were clear and the applicable law was correct, which should be maintained. Accordingly, according to the provisions of Article 153, paragraph 1 (1) and Article 158 of the Civil Procedure Law of People's Republic of China (PRC), the judgment is as follows: the appeal is dismissed and the original judgment is upheld.