The ability needs to be improved for a period of time before attending the training. The Party School is a school where the Party trains educational cadres in party member and party member, and it is a public management institution under the leadership of the Party Committee. If you don't want to participate in the training, you can say that your ability needs to be improved after a while, so that the leaders can understand and accept it. When expressing rejection of something, starting with praise will lower one's psychological defense, and then refusing with justified reasons, don't beat around the bush.