坛

platform / rostrum / altar

earthen jar

(classical) to say

Tu (ethnic group) / surname Tu

earth / dust / clay / local / indigenous / crude opium / unsophisticated / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

surname Yun / abbr. for Yunnan Province 雲南省|云南省[Yun2 nan2 Sheng3]

cloud / CL:朵[duo3]

altar

political circles

jug (earthenware with a big belly and a small opening)

music circles / music world

singing stage / music business (esp. pop music)

moviedom / the world of movies / film circles

sporting circles / the world of sport

literary circles

Temple of Heaven (in Beijing)

painting world / painting circles

World Economic Forum

the calligraphic community

baseball circles / baseball world

Temple of Earth (in Beijing)

International Herald Tribune

martial arts circles

Bo'ao Forum for Asia (since 2001)

the world of Chinese opera / theatrical circles

ordination platform in a Buddhist temple

Ara (constellation)