Zhè / fèn / chéng / nuò / bù / néng / zhǐ / tíng / liú / zài / zhǐ / miàn / shàng / fǒu / zé / huì / chéng / wéi / yī / zhǐ / kōng / wén

这份承诺不能只停留在纸面上，否则会成为一纸空文。

This promise cannot remain only on paper, or it will become a worthless piece of paper.