General information
Phone：+86-10-64996411 / 64995598
Email：tesol@i21st.cn
Proposals service
Phone：+86-10-64995494 / 64996408
Email：proposal@i21st.cn
Business cooperation
Phone：+86-10-64918211 / 64995508
Email：tesol@i21st.cn
Address：No15 Huixin Dongjie Beijing P.R.China, 100029