Now for doing the job in HK Island, my cost of living increased so much, there's already an extra transport expense for crossing the harbour, and for meals it is also more expensive there.
Examples (Wiktionary)
Mandarin
你无法瞒天过海。
你無法瞞天過海。
nǐ wú fǎ mán tiān guò hǎi .
You can't get away with it.
Mandarin
要是他没有下令做这个调查她本可以瞒天过海好多年
要是他沒有下令做這個調查她本可以瞞天過海好多年
yào shì tā méi yǒu xià lìng zuò zhè ge diào chá tā běn kě yǐ mán tiān guò hǎi hǎo duō nián
If he didn't order this investigation, she could have flown under the radar for years.