网页Lìdōng, Rittō, Ipdong, or Lập đông (Chinese and Japanese: 立冬; pinyin: lìdōng; rōmaji: rittō; Korean: 입동; romaja: ipdong; Vietnamese: lập đông; "start of winter") is the 19th solar term. It begins when the Sun reaches the celestial longitude of 225° and ends when it reaches the longitude of 240°. It more often refers in ...