Cambodian long saber
Sized like the Chinese changren dadao, yet the execution of the hilt is Cambodian.
Jūn Huǒ Jú-made shuāng shǒudāo
Produced in the ordnance factory in Zengbu, near Guangzhou.
An antique chángdāo
Its large blade is of ridged cross-section, inspired by the Japanese design.
Antique Miaodao
Miaodao simply being a more recent name for the wodao.