以便 (so as to / in order to)

So we can reach you

• A hotel receptionist asks for your phone number at check-in.
• please请qǐngleave留下liú xiàyou (polite)您nín(modifier / structural particle)的dea number电话diàn huà，so that以便yǐ biànwe我们wǒ mencontact联系lián xìyou (polite)您nín。 — "Please leave your phone number so that we can contact you."

Action，so that以便yǐ biàn + positive purpose

• so that以便yǐ biàn = "so that, in order to (make it easier to)": the second clause is the purpose the action serves.
• It is formal, common in instructions and notices.

please请qǐngin advance提前tí qiánregister报名bào míng，so that以便yǐ biànwe我们wǒ mencan arrange安排ān pái。

Practical arrangements

• we我们wǒ men(把: marks the object)把bǎ(concept of) time时间shí jiānin advance提前tí qián(completed / change)了le，so that以便yǐ biàneveryone大家dà jiā早点儿zǎo diǎn érto return home回家huí jiā。 — "We moved the time earlier so everyone can get home sooner."
• please请qǐngkeep保留bǎo liúthe receipt收据shōu jù，so that以便yǐ biànlater日后rì hòuto check查询chá xún。 — "Please keep the receipt for future reference."

please请qǐngkeep保留bǎo liúthe receipt收据shōu jù，so that以便yǐ biànlater日后rì hòuto check查询chá xún。

Positive goals only

so that以便yǐ biàn versus in order to为了wèi le and good好hǎo

• in order to为了wèi le + goal usually comes first: in order to为了wèi lemake easier方便fāng biàncontact联系lián xì，please请qǐngleave留下liú xiàa number电话diàn huà.
• so that以便yǐ biàn / good好hǎo come after the action; good好hǎo is the spoken one: 留个liú gèa number电话diàn huà，good好hǎocontact联系lián xìyou你nǐ.

in order to为了wèi lemake easier方便fāng biàncontact联系lián xì，please请qǐngleave留下liú xiàa number电话diàn huà。

Recap

Read the full reference: HSK 6 grammar — Verb phrases.