根据合同上的声明，出现问题时双方应先协商解决。

Gēnjù hétóng shàng de shēngmíng, chūxiàn wèntí shí shuāngfāng yīng xiān xiéshāng jiějué.

According to the statement in the contract, when problems arise, both parties should first negotiate a solution.

他在会议上声明自己没有做错。

Tā zài huìyì shàng shēngmíng zìjǐ méiyǒu zuòcuò.

He stated at the meeting that he did nothing wrong.

他提前声明，这次只是个人意见，不代表单位立场。

Tā tíqián shēngmíng, zhè cì zhǐshì gèrén yìjiàn, bù dàibiǎo dānwèi lìchǎng.

He stated in advance that this time it was only his personal opinion and did not represent the position of his organization.