jump on the bandwagon, climb on the bandwagonv exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
figurative, informal (do [sth] because it is popular)
转而支持得势的一方 zhuǎn ér zhī chí dé shì de yì fāng
随大流 suí dà liú
If you believe in the cause, great, but don't just jump on the bandwagon.