The Kity 618 table saw is a full-sized machine, with a sliding table. It is one of the more affordable machines of this size available on the second-hand market. Don’t expect professional quality, but if you want a decent machine for a low price, this is a good option.
In name it is similar to the Kity 617, but it actually very different. It has a fully enclosed metal stand and comes with a sliding table. This table has a hold-down clamp which can be used to secure your workpiece when crosscutting.
The machine later got upgrades under the names Kity 619 and after that Kity 1619. A smaller, but similar version named Kity 419 was also developed.
Kity machines were not made to the highest standards, but are very useable machines if you know their limitations. Their price also reflects this, and they tend to still be better than most modern machines at this price level.