General unit trust question, why do different sources report different fund performance figures? Who actually has the "most accurate" data?

Example below for Principal Greater China Equity Fund.

My worst investment decision ever made. Yes I can handle those high risk investment. For long term it may outperform but currently down by more than 20% even when other index funds are in green ( before omicron news).
Maybe I failed as  an investor.
Anyway going to continuous dca to minimise the loss.
Should've allocate more into index funds.

Oh whelp, time for me to find a new china focused fund. 

I'm thinking of shooting an email to FSM to remind them to send the Ang pow packets to me without using the snail mail. Twice in a row I receive the red packets after Chinese new year or its missing.

Do you think I'm a little weird by doing so?

Looking for some advise. I want to start putting money into VOO and VUSXX. Is FSM the lowest fees platform vs stashaway, versa, moomoo?
I dont mind manually purchasing it every month or quarter, but RSP sounds convinient.

both parties get some benefit? or only you?