Cov neeg siv khoom thiab cov phooj ywg,
Peb yuav koom nrog peb hnub Beijing Optical Fair (B011 / B022), tos ntsoov koj tuaj xyuas.
Lub sijhawm ntawd, peb yuav nthuav tawm peb lub tuam txhab cov khoom lag luam. Txais tos rau peb lub rooj muag khoom kom paub txog.
Lub sijhawm tshaj tawm: Cuaj hlis-02-2023