应邀

at sb’s invitation;on(or upon)invitation
中国代表团～出席大会，感到荣幸和愉快。The Chinese Delegation is honored (or privileged) and pleased (or delighted) to be invited to the Conference/～出席国宴be invited to the state banquet;attend the state banquet upon invitation/～来中国访问come to visit China upon invitation/～派代表团参加国庆活动send a delegation to attend the national day celebrations at the invitation (of the Chinese Government)