It was with the establishment of the Monthon, a former administrative unit, that all three cities were merged into one under the name Chaiya.
यह मनथन के साथ स्थापित हुआ था, पुरानी संचालन इकाई, जिसमें छैया नाम के तीनों शहर एक ही में जुड़ गये।